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Magnetic Materials

GMR Harddisk, courtesy IBM GermanyMagnetic phenomena are omnipresent in the modern world. The Nobel prize in Physics (2007) was awarded for studies of giant magnetoresistance to A. Fert and P. Grünberg; their discoveries were soon implemented in hard drives (see picture, courtesy of IBM Germany). Learn more about the current research into magnetic materials, basic or applied.

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Recent Articles

Concepts of antiferromagnetic spintronics

Concepts of antiferromagnetic spintronics

[Review@RRL]
O. Gomonay, T. Jungwirth, J. Sinova
Phys. Status Solidi RRL, February 21, 2017, DOI: 10.1002/pssr.201700022. Read article

Investigation of exchange coupled bilayer Fe/CuMnAs by pump–probe experiment

Investigation of exchange coupled bilayer Fe/CuMnAs by pump–probe experiment

[Rapid Research Letter]
Vít Saidl, Petr Němec, Peter Wadley, Kevin W. Edmonds, Richard P. Campion, Vít Novák, Bryan L. Gallagher, František Trojánek, Tomáš Jungwirth
Phys. Status Solidi RRL, February 21, 2017, DOI: 10.1002/pssr.201600441. Read article

Magneto-Photoluminescence Based on Two-Photon Excitation in Lanthanide-Doped Up-Conversion Crystal Particles

Magneto‐Photoluminescence Based on Two‐Photon Excitation in Lanthanide‐Doped Up‐Conversion Crystal Particles

Magneto-photoluminescence can be observed, when the two-photon excitation exceeds the critical intensity 2080 mW cm−2 in up-converting Y2O2S:Er, Yb crystals at room temperature. Spin-dependent transition dipoles with operative spin mixing between antiparallel and parallel spins form the necessary condition to generate magneto-photoluminescence in up-conversion materials.

[Communication]
Hengxing Xu, Wei Qin, Mingxing Li, Ting Wu, Bin Hu
Small, February 20, 2017, DOI: 10.1002/smll.201603363. Read article

Dynamic Magnetic and Optical Insight into a High Performance Pentagonal Bipyramidal DyIII Single-Ion Magnet

Dynamic Magnetic and Optical Insight into a High Performance Pentagonal Bipyramidal DyIII Single‐Ion Magnet

Pentagonal SIM: Dynamic magnetism and magneto-optical correlation were studied for a pentagonal bipyramidal DyIII single-ion magnet (SIM) based on fluorescence-active phosphine oxide with large Ueff=508(2) K and high magnetic hysteresis temperature of 19 K (see figure).

[Full Paper]
Yan-Cong Chen, Jun-Liang Liu, Yanhua Lan, Zhi-Qiang Zhong, Akseli Mansikkamäki, Liviu Ungur, Quan-Wen Li, Jian-Hua Jia, Liviu F. Chibotaru, Jun-Bo Han, Wolfgang Wernsdorfer, Xiao-Ming Chen, Ming-Liang Tong
Chem. Eur. J., February 20, 2017, DOI: 10.1002/chem.201606029. Read article

Ab Initio Crystal Field for Lanthanides

Ab Initio Crystal Field for Lanthanides

A fully ab initio methodology for the unique determination of the parameters of the crystal field in lanthanide complexes is presented and contrasted with experimental, phenomenological, and electrostatic models. It is found that the metal–ligand covalence gives the dominant contribution to the crystal field in lanthanides.

[Full Paper]
Liviu Ungur, Liviu F. Chibotaru
Chem. Eur. J., February 20, 2017, DOI: 10.1002/chem.201605102. Read article

Novel Bimorphological Anisotropic Bulk Nanocomposite Materials with High Energy Products

Novel Bimorphological Anisotropic Bulk Nanocomposite Materials with High Energy Products

The fabrication of novel bimorphological anisotropic SmCo7/Fe(Co) bulk nanostructures with a multistep deformation approach is demonstrated. The structures exhibit a record-high energy product (28 MGOe) for this class of bulk materials with less rare-earth elements. The resulting nanocomposite outperforms, for the first time, corresponding pure rare-earth permanent magnet (SmCo7) with 58% enhancement in energy product.

[Communication]
Xiaohong Li, Li Lou, Wenpeng Song, Guangwei Huang, Fuchen Hou, Qian Zhang, Hai-Tian Zhang, Jianwei Xiao, Bin Wen, Xiangyi Zhang
Adv. Mater., February 20, 2017, DOI: 10.1002/adma.201606430. Read article

Topological spin Hall effect in antiferromagnetic skyrmions

Topological spin Hall effect in antiferromagnetic skyrmions

[Rapid Research Letter]
Patrick M. Buhl, Frank Freimuth, Stefan Blügel, Yuriy Mokrousov
Phys. Status Solidi RRL, February 17, 2017, DOI: 10.1002/pssr.201700007. Read article

Ultrasmall Yttrium Iron Garnet Nanoparticles with High Coercivity at Low Temperature Synthesized by Laser Ablation and Fragmentation of Pressed Powders

Ultrasmall Yttrium Iron Garnet Nanoparticles with High Coercivity at Low Temperature Synthesized by Laser Ablation and Fragmentation of Pressed Powders

Target density matters: The porosity of targets used in pulsed laser ablation in liquids (PLAL) is a crucial factor that has far-reaching implications on nanoparticle quality and productivity. The PLAL of pressed yttrium iron garnet (YIG) powders in water is studied and compared to the ablation of a single-crystal target to achieve YIG nanoparticles with sizes smaller than 3 nm and unexpected magnetic properties with huge coercive and irreversibility fields.

[Article]
Tim Schmitz, Ulf Wiedwald, Carsten Dubs, Bilal Gökce
ChemPhysChem, February 17, 2017, DOI: 10.1002/cphc.201601183. Read article

Magnetic Anisotropy in Pentacoordinate NiII and CoII Complexes: Unraveling Electronic and Geometrical Contributions

Magnetic Anisotropy in Pentacoordinate NiII and CoII Complexes: Unraveling Electronic and Geometrical Contributions

Nature and magnitude of the magnetic anisotropy of pentacoordinate NiII and CoII complexes [MII(Me4cyclam)N3]+ were studied by complementary magnetic measurements, high-field EPR spectroscopy, single-crystal torque magnetometry studies, and ab initio calculations, which unraveled the synergic effect of the electronic configuration of the metal ion and the structure-orienting influence of the Me4cyclam tetradentate ligand (see figure).

[Full Paper]
Benjamin Cahier, Mauro Perfetti, Georges Zakhia, Daoud Naoufal, Fatima El-Khatib, Régis Guillot, Eric Rivière, Roberta Sessoli, Anne-Laure Barra, Nathalie Guihéry, Talal Mallah
Chem. Eur. J., February 16, 2017, DOI: 10.1002/chem.201604872. Read article

Tweezing of Magnetic and Non-Magnetic Objects with Magnetic Fields

Tweezing of Magnetic and Non‐Magnetic Objects with Magnetic Fields

Magnetic tweezing of microscopic objects can be realized either by using positive magnetophoresis (e.g., migration of paramagnetic objects in non-magnetic medium towards increasing field strength) or negative magnetophoresis (e.g., migration of non-magnetic particles in paramagnetic medium towards decreasing field strength). This Progress Report summarizes theoretical and experimental works and recent advances and applications for both magnetic tweezing modalities.

[Progress Report]
Jaakko V. I. Timonen, Bartosz A. Grzybowski
Adv. Mater., February 15, 2017, DOI: 10.1002/adma.201603516. Read article

Competition between Cation–Solvent and Cation–Anion Interactions in Imidazolium Ionic Liquids with Polar Aprotic Solvents

Competition between Cation–Solvent and Cation–Anion Interactions in Imidazolium Ionic Liquids with Polar Aprotic Solvents

Solvent donicity makes the difference: Accurate NMR chemical shift analysis discloses a subtle balance between ion association and ion solvation in mixtures of imidazolium ionic liquids and polar molecular solvents. The less polar but more donating γ-butyrolactone favors cation solvation more than propylene carbonate. Anions modulate this effect via competing cation–anion interactions.

[Communication]
Bogdan A. Marekha, Oleg N. Kalugin, Marc Bria, Toshiyuki Takamuku, Slobodan Gadžurić, Abdenacer Idrissi
ChemPhysChem, February 14, 2017, DOI: 10.1002/cphc.201601445. Read article

Manipulation of antiferromagnetic domain distribution in Mn2Au by ultrahigh magnetic fields and by strain

Manipulation of antiferromagnetic domain distribution in Mn2Au by ultrahigh magnetic fields and by strain

[Rapid Research Letter]
A. A. Sapozhnik, R. Abrudan, Yu. Skourski, M. Jourdan, H. Zabel, M. Kläui, H.-J. Elmers
Phys. Status Solidi RRL, February 10, 2017, DOI: 10.1002/pssr.201600438. Read article

Readdressing of Magnetoelectric Effect in Bulk BiFeO3

Readdressing of Magnetoelectric Effect in Bulk BiFeO3

The present readdressing of the magnetoelectric effect in bulk BiFeO3 reveals that the strong magnetoelectric coupling and weak ferromagnetism are actually incompatible. To resolve such a contradiction, an electric-field-induced phase transition from the weak ferromagnetic state to the cycloidal spin state is focused and the concomitant reduction of the magnetization has been observed.

[Full Paper]
Xin Xin Shi, Xiao Qiang Liu, Xiang Ming Chen
Adv. Funct. Mater., February 10, 2017, DOI: 10.1002/adfm.201604037. Read article

Why Are Dithienylethene-Linked Biscobaltocenes so Hard to Photoswitch?

Why Are Dithienylethene‐Linked Biscobaltocenes so Hard to Photoswitch?

You can lead a horse to water…: The introduction of a dithienylethene (DTE) linker as a molecular switch between two paramagnetic sandwich complexes is quite successful, in contrast to the switching process. An explanation is given by means of DFT calculations.

[Article]
Alejandra Escribano, Torben Steenbock, Conrad Stork, Carmen Herrmann, Jürgen Heck
ChemPhysChem, February 09, 2017, DOI: 10.1002/cphc.201601146. Read article

Five Rare μ4-O-Centered Ln6 Clusters with Single-Molecule Magnet Behavior for Dy6

Five Rare μ4‐O‐Centered Ln6 Clusters with Single‐Molecule Magnet Behavior for Dy6

Single, with magnetic personality: Five hexanuclear [Ln64-O)2(HCOO)2L4(HL′)2(dmf)2] (Ln=Dy, Er, Ho, Tb, Gd; H2L=2-{[2-(hydroxymethyl)phenylimino]methyl}-6-methoxyphenol; H3L′=3-{[2-(hydroxymethyl)phenylimino]methyl}benzene-1,2-diol) clusters are prepared. These clusters have unprecedented double tetrahedron topologies, and the Dy6 cluster exhibits single-molecule magnet behavior.

[Full Paper]
Haifeng Zhang, Rui Liu, Jin Zhang, Yahong Li, Wei Liu, Yaping Dong
Chem. Asian J., February 08, 2017, DOI: 10.1002/asia.201601412. Read article

Co-sputtered PtMnSb thin films and PtMnSb/Pt bilayers for spin–orbit torque investigations

Co‐sputtered PtMnSb thin films and PtMnSb/Pt bilayers for spin–orbit torque investigations

[Rapid Research Letter]
Jan Krieft, Johannes Mendil, Myriam H. Aguirre, Can O. Avci, Christoph Klewe, Karsten Rott, Jan-Michael Schmalhorst, Günter Reiss, Pietro Gambardella, Timo Kuschel
Phys. Status Solidi RRL, February 07, 2017, DOI: 10.1002/pssr.201600439. Read article

Magnetically Recoverable Pd/Fe3O4 Core–Shell Nanowire Clusters with Increased Hydrogenation Activity

Magnetically Recoverable Pd/Fe3O4 Core–Shell Nanowire Clusters with Increased Hydrogenation Activity

Synergy! Thin palladium nanowires are formed by self-assembly and then coated with a magnetically active iron oxide shell to provide Pd/Fe3O4 core–shell nanowire clusters (see picture). The nanostructures were tested as a hydrogenation catalyst for the conversion of acetophenone to 1-phenylethanol. This catalyst demonstrates increased activity and enantioselectivity and can be recovered easily by magnetic separation.

[Communication]
John Watt, Paul G. Kotula, Dale L. Huber
ChemPlusChem, February 06, 2017, DOI: 10.1002/cplu.201700009. Read article

Single Molecular Wells–Dawson-Like Heterometallic Cluster for the In Situ Functionalization of Ordered Mesoporous Carbon: A T 1- and T 2-Weighted Dual-Mode Magnetic Resonance Imaging Agent and Drug Delivery System

Single Molecular Wells–Dawson‐Like Heterometallic Cluster for the In Situ Functionalization of Ordered Mesoporous Carbon: A T
1‐ and T
2‐Weighted Dual‐Mode Magnetic Resonance Imaging Agent and Drug Delivery System

Highly heterometallic γ-Fe2O3 and GdPO4 nanoparticle-incorporated ordered mesoporous carbons are facilely prepared by a one-pot in situ method using a Wells–Dawson-like cluster of [Fe6Gd63-O)2(CO3)(O3PPh)6(O2CtBu)18] as the precursor. In vitro experiments confirm the prepared composite displays a satisfactory T1- and T2-weighted magnetic resonance imaging effect and a drug carrier ability simultaneously, suggesting a potential application as a magnetic resonance diagnostic and therapy agent.

[Full Paper]
Qianqian Zhang, Peiyuan Wang, Yun Ling, Xiaomin Li, Lixue Xia, Yongtai Yang, Xiaofeng Liu, Fan Zhang, Yaming Zhou
Adv. Funct. Mater., February 01, 2017, DOI: 10.1002/adfm.201605313. Read article

Antitumor Platelet-Mimicking Magnetic Nanoparticles

Antitumor Platelet‐Mimicking Magnetic Nanoparticles

Platelet (PLT) membranes are collected from mice blood and further used to coat magnetic nanoparticles (MNs). And the resulting platelet-mimicking particles (PLT-MNs) are then injected back into the donor mice for enhanced tumor magnetic resonance imaging and photothermal therapy. This work presents a new angle on the design of advanced functional materials for personalized cancer theranostics.

[Full Paper]
Lang Rao, Lin-Lin Bu, Qian-Fang Meng, Bo Cai, Wei-Wei Deng, Andrew Li, Kaiyang Li, Shi-Shang Guo, Wen-Feng Zhang, Wei Liu, Zhi-Jun Sun, Xing-Zhong Zhao
Adv. Funct. Mater., February 01, 2017, DOI: 10.1002/adfm.201604774. Read article

Nuclear-Targeted Multifunctional Magnetic Nanoparticles for Photothermal Therapy

Nuclear‐Targeted Multifunctional Magnetic Nanoparticles for Photothermal Therapy

An efficient nuclear-targeted photothermal therapy (PTT) strategy is developed by using transferrin and TAT peptide (TAT: YGRKKRRQRRR) conjugated monodisperse magnetic nanoparticles. The multifunctional magnetic nanoparticles can be readily functionalized and stabilized for potential diagnostic and therapeutic applications. In addition, they exhibit excellent PTT effects by targeting nucleus, leading to a significant enhancement in the photothermal therapy.

[Full Paper]
Haibao Peng, Jing Tang, Rui Zheng, Guannan Guo, Angang Dong, Yajun Wang, Wuli Yang
Adv. Healthcare Mater., January 27, 2017, DOI: 10.1002/adhm.201601289. Read article

Gas Phase Synthesis of Multifunctional Fe-Based Nanocubes

Gas Phase Synthesis of Multifunctional Fe‐Based Nanocubes

A flexible gas-phase synthesis method is demonstrated for the fabrication of multifunctional hybrid Fe nanocubes by means of morphological control during formation. Utilizing this approach, magneto-plasmonic properties of Fe nanocubes are tailored by Au-doping, and Fe-based gas sensors are realized with remarkable performance for NO2 detection down to concentrations as low as 3 ppb.

[Full Paper]
Jerome Vernieres, Stephan Steinhauer, Junlei Zhao, Audrey Chapelle, Philippe Menini, Nicolas Dufour, Rosa E. Diaz, Kai Nordlund, Flyura Djurabekova, Panagiotis Grammatikopoulos, Mukhles Sowwan
Adv. Funct. Mater., January 25, 2017, DOI: 10.1002/adfm.201605328. Read article

Spin Hall magnetoresistance in antiferromagnet/normal metal bilayers

Spin Hall magnetoresistance in antiferromagnet/normal metal bilayers

[Rapid Research Letter]
Aurélien Manchon
Phys. Status Solidi RRL, January 23, 2017, DOI: 10.1002/pssr.201600409. Read article

Heterometallic [Cu2Ln3] (Ln = DyIII, GdIII and HoIII) and [Cu4Ln2] (Ln = DyIII and HoIII) Compounds: Synthesis, Structure, and Magnetism

Heterometallic [Cu2Ln3] (Ln = DyIII, GdIII and HoIII) and [Cu4Ln2] (Ln = DyIII and HoIII) Compounds: Synthesis, Structure, and Magnetism

[Full Paper]
Sourav Biswas, Prasenjit Bag, Sourav Das, Subrata Kundu, Jan van Leusen, Paul Kögerler, Vadapalli Chandrasekhar
Eur. J. Inorg. Chem., January 23, 2017, DOI: 10.1002/ejic.201601210. Read article

Elucidation of the Physicochemical Properties Ruling the Colloidal Stability of Iron Oxide Nanoparticles under Physiological Conditions

Elucidation of the Physicochemical Properties Ruling the Colloidal Stability of Iron Oxide Nanoparticles under Physiological Conditions

Colloidal stability of nanoparticles in biological fluids is a relevant issue for their use in biomedical applications, and tightly depends on the dispersion media but also on the nanoparticle coating.

[Full Paper]
Antonio Aires, David Cabrera, Laura C. Alonso-Pardo, Aitziber L. Cortajarena, Francisco J. Teran
ChemNanoMat, January 23, 2017, DOI: 10.1002/cnma.201600333. Read article

Functional Perovskites by Atomic Layer Deposition – An Overview

Functional Perovskites by Atomic Layer Deposition – An Overview

Atomic layer deposition of perovskite and perovskite related complex oxide thin films with piezo- and ferroelectric and ferromagnetic properties are summarized in this short Review.

[Review]
Henrik Hovde Sønsteby, Helmer Fjellvåg, Ola Nilsen
Adv. Mater. Interfaces, January 20, 2017, DOI: 10.1002/admi.201600903. Read article

p-Phosphonated Calix[n]arene Stabilizes Superparamagnetic Nanoparticles for Nitrate and Phosphate Uptake

p‐Phosphonated Calix[n]arene Stabilizes Superparamagnetic Nanoparticles for Nitrate and Phosphate Uptake

Clean up your act! Highly faceted superparamagnetic magnetite nanoparticles roughly 11 nm in diameter form in the presence of p-phosphonated calix[n]arenes (n=4–6) and these nanoparticles are effective in removing nitrate nitrogen and phosphate from aqueous effluent.

[Full Paper]
Nicholas J. D'Alonzo, Paul K. Eggers, Ela Eroglu, Colin L. Raston
ChemPlusChem, January 19, 2017, DOI: 10.1002/cplu.201600554. Read article

Laser Alloying of Co Nanorods and Al Nanoparticles in a Liquid

Laser Alloying of Co Nanorods and Al Nanoparticles in a Liquid

Co–Al nanoparticles are generated by laser exposure of a colloidal mixture of cobalt nanorods and aluminum spherical nanoparticles.

[Article]
Ekaterina V. Barmina, Ilya A. Sukhov, Guillaume Viau, Georgy A. Shafeev
ChemPhysChem, January 18, 2017, DOI: 10.1002/cphc.201601115. Read article

Ordered Mesoporous Silica Monoliths as a Versatile Platform for the Study of Magnetic and Photomagnetic Prussian Blue Analogue Nanoparticles

Ordered Mesoporous Silica Monoliths as a Versatile Platform for the Study of Magnetic and Photomagnetic Prussian Blue Analogue Nanoparticles

The use of mesoporous silica as a matrix for the formation of nanoparticles of magnetic and photomagnetic coordination compounds enables the study of the properties of the compounds at the nanoscale owing to the versatility of the synthetic pathway.

[Full Paper]
Robinson Moulin, Emilie Delahaye, Amélie Bordage, Emiliano Fonda, Jean-Pierre Baltaze, Patricia Beaunier, Eric Rivière, Giulia Fornasieri, Anne Bleuzen
Eur. J. Inorg. Chem., January 17, 2017, DOI: 10.1002/ejic.201601196. Read article

Green Synthesis of Sub-10 nm Gadolinium-Based Nanoparticles for Sparkling Kidneys, Tumor, and Angiogenesis of Tumor-Bearing Mice in Magnetic Resonance Imaging

Green Synthesis of Sub‐10 nm Gadolinium‐Based Nanoparticles for Sparkling Kidneys, Tumor, and Angiogenesis of Tumor‐Bearing Mice in Magnetic Resonance Imaging

Sparkling kidneys, tumor, and angiogenesis with sub-10 nm biocompatible gadolinium-based nanoparticles are prepared in an environmentally benign and straightforward synthetic fashion. The resultant nanoparticles have well defined and stable structure, excellent stability, and high biocompatibility. Particularly, they can light the kidneys and also tumor through the surrounding tumor angiogenesis.

[Full Paper]
Bingbo Zhang, Weitao Yang, Jiani Yu, Weisheng Guo, Jun Wang, Shiyuan Liu, Yi Xiao, Donglu Shi
Adv. Healthcare Mater., December 22, 2016, DOI: 10.1002/adhm.201600865. Read article

Field-free, spin-current control of magnetization in non-collinear chiral antiferromagnets

Field‐free, spin‐current control of magnetization in non‐collinear chiral antiferromagnets

[Rapid Research Letter]
Hiroyuki Fujita
phys. stat. sol. (RRL), December 14, 2016, DOI: 10.1002/pssr.201600360. Read article

Structural Diversity of Three Pyrazoyl–Carboxyl Bifunctional Ligand-Based Metal–Organic Frameworks: Luminescence and Magnetic Properties

Structural Diversity of Three Pyrazoyl–Carboxyl Bifunctional Ligand‐Based Metal–Organic Frameworks: Luminescence and Magnetic Properties

Two in one: Three MOFs have been synthesized from the same bifunctional pyrazoyl–carboxyl ligand. Complexes 1 (see figure) and 3 contain dinuclear clusters and reveal a gis zeolite 3D net and a 2D structure, respectively. Complex 3 shows red luminescence as a result of energy transfer from the organic ligand to the EuIII ion. Complex 2 reveals a rare (3,8)-connected tfz-d; UO3 net with an unusual Mn4(COO)6 cluster and shows antiferromagnetic properties.

[Full Paper]
Gao-Peng Li, Hong-Yun Yang, Yong-Zhi Li, Lei Hou, Bin Liu, Yao-Yu Wang
ChemPlusChem, November 29, 2016, DOI: 10.1002/cplu.201600521. Read article

Introducing Barium in Transition Metal Oxide Frameworks: Impact upon Superconductivity, Magnetism, Multiferroism and Oxygen Diffusion and Storage

Introducing Barium in Transition Metal Oxide Frameworks: Impact upon Superconductivity, Magnetism, Multiferroism and Oxygen Diffusion and Storage

Strongly correlated electron systems are observed for mixed valent transition metal oxide frameworks hosting alkaline earth and lanthanide cations. The introduction of barium in the cavities of the oxide framework allows generally an ordering with other cations due to its larger size. The specific affinity of barium with respect to oxygen allows the oxygen content, and consequently the electronic charge distribution to be tuned and favors oxygen and anionic vacancies ordering. These two specific characteristics allow best performances to be reached as well for the physical properties, such as superconductivity, magnetism or multiferroicity as for oxygen storage.

[Personal Account]
Bernard Raveau
Chem. Rec., November 25, 2016, DOI: 10.1002/tcr.201600119. Read article

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