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Asymmetric magnetization reversal is an unusual phenomenon in antiferromagnet / ferromagnet (AF/FM) exchange biased bilayers. We investigated this phenomenon in a simple model system experimentally and by simulation assuming inhomogeneously…

Materials Science · Physics 2009-11-11 Zhi-Pan Li , Oleg Petracic , Rafael Morales , Justin Olamit , Xavier Batlle , Kai Liu , Ivan K. Schuller

Extending the current understanding and use of magnonics beyond conventional planar systems, we demonstrate surface localization of spin-wave ferromagnetic resonance (FMR) modes by designing complex three-dimensional nanostructures. Using…

Mesoscale and Nanoscale Physics · Physics 2024-11-07 Mateusz Gołębiewski , Krzysztof Szulc , Maciej Krawczyk

A new model of localized highly frustrated ferromagnetism is presented: kagome spin ice. By use of analytical and Monte Carlo calculations its massive groundstate entropy is evaluated. Monte Carlo calculations are also used to explore the…

Materials Science · Physics 2007-05-23 A. S. Wills , R. Ballou , C. Lacroix

We present an elaborate electron-spin resonance study of the low-energy dynamics and magnetization in the ordered phase of the magnetically frustrated spinel ZnCr$_2$O$_4$. We observe several resonance modes corresponding to different…

Strongly Correlated Electrons · Physics 2010-11-29 V. N. Glazkov , A. M. Farutin , V. Tsurkan , H. -A. Krug von Nidda , A. Loidl

We present the Co-Gd composition dependence of the spin-Hall magnetoresistance (SMR) and anisotropic magnetoresistance (AMR) for ferrimagnetic Co100-xGdx / Pt bilayers. With Gd concentration x, its magnetic moment increasingly competes with…

Materials Science · Physics 2018-09-14 W. Zhou , T. Seki , T. Kubota , G. E. W. Bauer , K. Takanashi

Violation of the fluctuation-dissipation theorem (FDT) in a frustrated Heisenberg model on the Kagome lattice is investigated using Monte Carlo simulations. The model exhibits glassy behaviour at low temperatures accompanied by very slow…

Statistical Mechanics · Physics 2009-11-10 S. Bekhechi , B. W. Southern

In this paper we explore the phase diagram and excitations of a distorted triangular lattice antiferromagnet. The unique two-dimensional distortion considered here is very different from the 'isosceles'-type distortion that has been…

Strongly Correlated Electrons · Physics 2016-11-11 S. Toth , B. Lake , K Hradil , T. Guidi , K. C. Rule , M. B. Stone , A. T. M. N. Islam

Spin wave calculations demonstrate that the macroscopic continuous degeneracy associated with the two-dimensional kagome Heisenberg spin lattice persists in the case of the stacked fcc structure giving rise to zero energy modes in three…

Strongly Correlated Electrons · Physics 2015-06-19 M. D. LeBlanc , B. W. Southern , M. L. Plumer , J. P. Whitehead

Detailed studies of the magnetoresistance of alpha-(ET)2KHg(SCN)4 and alpha-(ET)2TlHg(SCN)4 as a function of temperature, magnetic field strength, and field orientation are reported. Below 15 K, the temperature dependence of the…

Condensed Matter · Physics 2007-05-23 J. S. Qualls , J. S. Brooks , S. Uji , T. Terashima , C. Terakura , H. Aoki , L. K. Montgomery

New mechanism of magnetoresistance, based on tunneling-emission of spin polarized electrons from ferromagnets (FM) into semiconductors (S) and precession of electron spin in the semiconductor layer under external magnetic field, is…

Materials Science · Physics 2009-11-10 A. M. Bratkovsky , V. V. Osipov

We measure the angular dependence of the resonant dipole-dipole interaction between two individual Rydberg atoms with controlled relative positions. By applying a combination of static electric and magnetic fields on the atoms, we…

Atomic Physics · Physics 2015-08-27 Sylvain Ravets , Henning Labuhn , Daniel Barredo , Thierry Lahaye , Antoine Browaeys

Antiferromagnetic (AFM) materials with zero or vanishingly small macroscopic magnetization are nowadays the constituent elements of spintronic devices. However, possibility to use them as active elements that show nontrivial controllable…

Materials Science · Physics 2013-05-30 Helen V. Gomonay , Roman Kunitsyn , Vadim M. Loktev

Sophisticated spin instruments require high-precision spin control. In this study, we accurately study the intrinsic magnetic properties of the strongly disordered system NdFe0.5Cr0.5O3 through molecular field models combined with ASD…

Applied Physics · Physics 2022-07-08 Jiyu Shen , Jiajun Mo , Zeyi Lu , Chenying Gong , Kaiyang Gao , Ke Shi , Lizhou Yu , Yan Chen , Min Liu , Yanfang Xia

The dynamic behavior and stabilization of skyrmions in magnetic multilayers are critical for advancing spintronic and magnonic technologies. In our study, we investigate the static and dynamic properties of $[Re/Co(d_{Co})/Pt]_{20}$…

Magnetoresistance (MR) has attracted tremendous attention for possible technological applications. Understanding the role of magnetism in manipulating MR may in turn steer the searching for new applicable MR materials. Here we show that…

Strongly Correlated Electrons · Physics 2015-02-04 Hai-Feng Li , Yinguo Xiao , Berthold Schmitz , Jörg Persson , Wolfgang Schmidt , Paul Meuffels , Georg Roth , Thomas Brückel

Kagome magnets provide a fascinating platform for the realization of correlated topological quantum phases under various magnetic ground states. However, the effect of the magnetic spin configurations on the characteristic electronic…

We analyze the effects of lateral device size and magnetic material parameters on the ferromagnetic resonance (FMR) response. Results presented are directly relevant to widely used FMR experimental techniques for extracting magnetic…

Mesoscale and Nanoscale Physics · Physics 2013-01-01 Kwaku Eason , Maria Sabino , Michael Tran , Yun Fook Liew

Exchange anisotropy in ferromagnet/antiferromagnet (FM/AF) films is usually introduced along the cooling field or FM magnetization direction. Here we investigate the dependence of the exchange anisotropy, loop bifurcation, and reversal…

Materials Science · Physics 2007-05-23 Justin Olamit , Zhi-Pan Li , Ivan K. Schuller , Kai Liu

We report peculiar optical properties of the frustrated itinerant magnet HoAgGe, which exhibits multiple magnetically ordered states obeying the kagome spin-ice rule. The optical conductivity is surprisingly higher for light polarization…

Strongly Correlated Electrons · Physics 2025-04-15 F. Schilberth , L. DeFreitas , K. Zhao , F. LeMardelé , I. Mohelsky , M. Orlita , P. Gegenwart , H. Chen , I. Kézsmárki , S. Bordács

Dynamic properties of NiFe thin films on PMN-PT piezoelectric substrate are investigated using the spin-diode method. Ferromagnetic resonance (FMR) spectra of microstrips with varying width are measured as a function of magnetic field and…