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We investigate the effect of an external magnetic field on the physical properties of the acceptor hole states associated with single Mn acceptors placed near the (110) surface of GaAs. Crosssectional scanning tunneling microscopy images of…

Scrutiny of an established monoclinic magnetic space group for NdFeO3 reveals hitherto unknown properties of the orthoferrite. Future experiments using neutron and x-ray diffraction techniques can verify them. Neodymium ions possess Dirac…

Strongly Correlated Electrons · Physics 2023-06-28 Stephen W. Lovesey

We present a theory of magnetic anisotropy in ${\rm III}_{1-x}{\rm Mn}_{x}{\rm V}$ diluted magnetic semiconductors with carrier-induced ferromagnetism. The theory is based on four and six band envelope functions models for the valence band…

Materials Science · Physics 2009-10-31 M. Abolfath , T. Jungwirth , J. Brum , A. H. MacDonald

Magnetic anisotropy is a crucial characteristic for enhancing spintronic device performance. The synthesis of SmCrGe$_3$ single crystals through a high-temperature solution method has led to the determination of uniaxial magnetocrystalline…

Hexagonal alpha-Ru trichloride single crystals exhibit a strong magnetic anisotropy and we show that upon applying fields up to 14 T in the honeycomb plane the successive magnetic order at T1 = 14 K and T2 = 8 K could be completely…

Strongly Correlated Electrons · Physics 2015-06-02 M. Majumder , M. Schmidt , H. Rosner , A. A. Tsirlin , H. Yasuoka , M. Baenitz

Magnetic axis rotation (MAR) in ferromagnetic (FM) layers is crucial for strain-mediated converse magnetoelectric coupling. Employing the density functional theory (DFT), we computationally study the magnetic anisotropy of selected deformed…

Materials Science · Physics 2022-12-02 Zefeng Cai , Ben Xu

We show that the magnetic anisotropy in spinel-structure CoCr$_2$O$_4$ thin films exhibits a strain dependence in which compressive strain induces an out-of-plane magnetic easy axis and tensile strain an in-plane easy axis, exactly opposite…

High resolution magnetization measurements performed in a high quality Ba_(1-x)K_xFe2As2 single crystal allowed to determine the diamagnetism induced above the superconducting transition by thermally activated Cooper pairs. These data,…

Superconductivity · Physics 2012-08-27 J. Mosqueira , J. D. Dancausa , F. Vidal , S. Salem-Sugui, , A. Alvarenga , H. -Q. Luo , Z. -S. Wang , H. -H. Wen

We show that ions at the low densities and high magnetic fields relevant to the outer crust of magnetars form a novel crystalline phase where ions are strongly coupled along the magnetic field and loosely coupled in the transverse…

High Energy Astrophysical Phenomena · Physics 2013-12-03 Paulo F. Bedaque , Simin Mahmoodifar , Nathan Ng , Srimoyee Sen

The control of the magnetism of ultra-thin ferromagnetic layers using an electric field rather than a current, if large enough, would lead to many technologically important applications. To date, while it is usually assumed the changes in…

Materials Science · Physics 2013-12-05 Stewart E. Barnes , Jun'ichi Ieda , Sadamichi Maekawa

The effects of competing magnetic interactions in stabilizing different spin configurations are drawing a renewed attention in order to both unveil emerging topological spin textures and to highlight microscopic mechanisms leading to their…

Materials Science · Physics 2021-05-25 Danila Amoroso , Paolo Barone , Silvia Picozzi

We present a detailed theoretical investigation on the magnetic properties of small single-layered Fe, Co and Ni clusters deposited on Ir(111), Pt(111) and Au(111). For this a fully relativistic {\em ab-initio} scheme based on density…

Materials Science · Physics 2015-06-04 S. Bornemann , O. Šipr , S. Mankovsky , S. Polesya , J. B. Staunton , W. Wurth , H. Ebert , J. Minár

We present a model of equal spin $s_1$ dimer single molecule magnets. The spins within each dimer interact via the Heisenberg and the most general set of four quadratic anisotropic spin interactions with respective strengths $J$ and…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 Dmitri V. Efremov , Richard A. Klemm

We present a theory describing the single-ion anisotropy of rare earth (RE) magnets in the presence of point defects. Taking the RE-lean 1:12 magnet class as a prototype, we use first-principles calculations to show how the introduction of…

Materials Science · Physics 2023-08-23 Christopher E. Patrick , Yixuan Huang , Laura H. Lewis , Julie B. Staunton

Based on a detailed theoretical examination of the lattice distortion in high-index epilayers in terms of continuum mechanics, expressions are deduced that allow the calculation and experimental determination of the strain tensor for…

Materials Science · Physics 2015-05-18 L. Dreher , D. Donhauser , J. Daeubler , M. Glunk , C. Rapp , W. Schoch , R. Sauer , W. Limmer

The magnetic anisotropy of a novel Mn(II)-[3x3] grid complex was investigated by means of high-field torque magnetometry. Torque vs. field curves at low temperatures demonstrate a ground state with S > 0 and exhibit a torque step due to a…

Condensed Matter · Physics 2009-11-07 Oliver Waldmann , L. Zhao , L. K. Thompson

We demonstrate field-induced single-ion magnetic anisotropy resulting from the multiorbital Kondo effect on the diluted ytterbium alloy $(\mathrm{Lu}_{1-x}\mathrm{Yb}_x)\mathrm{Rh}_2\mathrm{Zn}_{20}$. Single-ion anisotropic metamagnetic…

Strongly Correlated Electrons · Physics 2023-08-08 T. Kitazawa , Y. Ikeda , T. Sakakibara , A. Matsuo , Y. Shimizu , Y. Tokunaga , Y. Haga , K. Kindo , Y. Nambu , K. Ikeuchi , K. Kamazawa , M. Ohkawara , M. Fujita

The anisotropy splitting in the ground state of the single-molecule magnet [Mn4O3Br(OAc)3(dbm)3] is studied by inelastic neutron scattering as a function of hydrostatic pressure. This allows a tuning of the anisotropy and thus the energy…

Strongly Correlated Electrons · Physics 2009-11-10 Andreas Sieber , Gregory Chaboussant , Roland Bircher , Colette Boskovic , Hans U. Guedel , George Christou , Hannu Mutka

The mixed spin-1/2 and spin-1 Ising model in the presence of an anisotropic crystalline field is treated exactly within the framework of an extended star-triangle mapping transformation. The exact results for the phase diagrams,…

Statistical Mechanics · Physics 2007-05-23 Jozef Strecka , Michal Jascur

Magnetic anisotropy is essential for stabilizing two-dimensional (2D) magnetism, which has significant applications in spintronics and the advancement of fundamental physics. In this work, we examine the electronic structure and magnetic…

Materials Science · Physics 2024-01-29 Shuhang Chen , Wenjing Xu , Yueyue Ning , Ke Yang