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By means of magneto-optical Kerr effect we observe spin reorientations from in-plane to out-of-plane and vice versa upon annealing thin Fe films on Ag(001) at increasing temperatures. Scanning tunneling microscopy images of the different Fe…

材料科学 · 物理学 2009-10-31 D. M. Schaller , D. E. Buergler , C. M. Schmidt , F. Meisinger , H. -J. Guentherodt

Effects of a microwave voltage on magnetization precession are analyzed based on a macrospin model. The microwave voltage induces the oscillating anisotropy field through the voltage controlled magnetic anisotropy (VCMA) effect, and then…

介观与纳米尺度物理 · 物理学 2021-01-04 Hiroshi Imamura , Rie Matsumoto

Magnetic straintronics, the strain-mediated control of magnetic anisotropy, has emerged as a key direction for next-generation energy-efficient technologies. In multiferroic heterostructures, magnetoelectric coupling is typically achieved…

Strongly magnetizing a plasma adds a range of waves that do not exist in unmagnetized plasmas and enlarges the laser-plasma interaction (LPI) landscape. In this paper, we use particle-in-cell (PIC) simulations to investigate strongly…

等离子体物理 · 物理学 2022-11-23 Lili Manzo , Matthew R. Edwards , Yuan Shi

Engineering magnetic anisotropy in a ferro- or ferrimagnetic (FM) thin film is crucial in spintronic device. One way to modify the magnetic anisotropy is through the surface of the FM thin film. Here, we report the emergence of a…

A magnetic field was recently shown to enhance field-parallel heat conduction in a strongly correlated plasma whereas cross-field conduction is reduced. Here we show that in such plasmas, the magnetic field has the additional effect of…

等离子体物理 · 物理学 2017-01-25 T. Ott , M. Bonitz , P. Hartmann , Z. Donkó

Coherent oscillations associated with spin precessions were observed in ultrafast optical experiments on ferromagnetic (Ga,Mn)As films. Using a complete theoretical description of the processes by which light couples to the magnetization,…

材料科学 · 物理学 2009-11-11 D. M. Wang , Y. H. Ren , X. Liu , J. K. Furdyna , M. Grimsditch , R. Merlin

The magnetic and transport properties of La$_{0.5}$Sr$_{0.5}$CoO$_{3-\delta}$ film grown on a LaAlO$_3$ substrate by pulsed-laser deposition are studied. The properties are found to be influenced by a combined influence of the magnetic…

材料科学 · 物理学 2009-11-07 B. I. Belevtsev , V. B. Krasovitsky , A. S. Panfilov , I. N. Chukanova

It is demonstrated by SQUID magnetization measurements that (Ga,Mn)As films can exhibit rich characteristics of magnetic anisotropy depending not only to the epitaxial strain but being strongly influenced by the hole and Mn concentration,…

We report on a strain-induced and temperature dependent uniaxial anisotropy in V$_{2}$O$_{3}$/Ni hybrid thin films, manifested through the interfacial strain and sample microstructure, and its consequences on the angular dependent…

介观与纳米尺度物理 · 物理学 2017-10-19 Dustin A. Gilbert , Juan Gabriel Ramírez , Thomas Saerbeck , Juan Trastoy , Ivan K. Schuller , Kai Liu , Jose de la Venta

We report the emergence of a novel interface-induced shape anisotropy component in zigzag-structured thin films fabricated via Sequential Oblique Angle Deposition (S-OAD). In this study, we systematically investigate cobalt (Co) and Co2FeAl…

Achieving ultrahigh recording densities with low power consumption is a central challenge for next generation heat assisted magnetic recording (HAMR), as conventional L10 FePt media require intense laser heating due to their high coercivity…

材料科学 · 物理学 2026-05-07 Saroj K. Mishra , Y. Sasaki , S. Isogami , I. Suzuki , Keerthana P , J. Mohanty , Y. K. Takahashi

Photo-excited precession of magnetization in (Ga,Mn)As is investigated by measuring time-resolved magneto-optical response and transient differential reflectivity with pump-and-probe technique. In the time region less than 1 ps, rapidly…

材料科学 · 物理学 2014-09-09 T. Matsuda , K. Nishibayashi , H. Munekata

We investigate phase transitions in the two-dimensional dipolar Heisenberg model with uniaxial anisotropy with a specific ratio between the exchange and dipolar constants, $\delta=1$. We obtain the $\eta$--$T$ (anisotropy vs. temperature)…

统计力学 · 物理学 2019-09-11 Hisato Komatsu , Yoshihiko Nonomura , Masamichi Nishino

It is demonstrated by SQUID measurements that (Ga,Mn)As films can exhibit perpendicular easy axis at low temperatures, even under compressive strain, provided that the hole concentration is sufficiently low. In such films, the easy axis…

The field-driven reorientation transition of an anisotropic ferromagnetic monolayer is studied within the context of a finite-temperature Green's function theory. The equilibrium state and the field dependence of the magnon energy gap $E_0$…

材料科学 · 物理学 2007-05-23 M. G. Pini , P. Politi , R. L. Stamps

We investigate the effects of anisotropy on the chiral condensate in a holographic model of QCD with a fully backreacted quark sector at vanishing chemical potential. The high temperature deconfined phase is a neutral and anisotropic plasma…

高能物理 - 理论 · 物理学 2020-08-05 Umut Gursoy , Matti Jarvinen , Govert Nijs , Juan F. Pedraza

Based on now historical magnetic and plasma data and available wave spectra from the AMPTE-IRM spacecraft, and on as well historical Equator-S high-cadence magnetic field observations of mirror modes in the magnetosheath near the dayside…

空间物理 · 物理学 2018-11-29 R. A. Treumann , W. Baumjohann

The rapidly increasing number of 2-dimensional (2D) materials that have been isolated or synthesized provides an enormous opportunity to realize new device functionalities. Whereas their optical and electrical characterization have been…

应用物理 · 物理学 2019-11-26 Mizanur Rahman , Mohammadreza Shahzadeh , Simone Pisana

The time and field dependence of the magnetic domain structure at magnetization reversal were investigated by Kerr microscopy in interacting ferromagnetic Co/Pt multilayers with perpendicular anisotropy. Large local inhomogeneous…

材料科学 · 物理学 2018-07-26 S. Wiebel , J. P. Jamet , N. Vernier , A. Mougin , J. Ferre , V. Baltz , B. Rodmacq , B. Dieny