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We performed a systematic analysis of the tunneling magnetoresistance (TMR) effect in single grain boundary junctions formed in epitaxial La(2/3)Ca(1/3)MnO(3) films deposited on SrTiO(3) bicrystals. For magnetic fields H applied parallel to…

Strongly Correlated Electrons · Physics 2009-10-31 J. B. Philipp , C. Hoefener , S. Thienhaus , J. Klein , L. Alff , R. Gross

We have performed magnetic measurements on a diluted system of gamma-Fe2O3 nanoparticles (~7nm), and on a ferritin sample. In both cases, the ZFC-peak presents a non-monotonic field dependence, as has already been reported in some…

Condensed Matter · Physics 2009-10-30 R. Sappey , E. Vincent , N. Hadacek , ; F. Chaput , J. P. Boilot , ; D. Zins

The correlation between static magnetoelectric coupling and magnetic structure was investigated in $TbMn_{0.98}Fe_{0.02}O_{3}$ with magnetic field up to 8 T and down to 2 K. Single-crystal neutron diffraction experiments reveal a…

In the present work, with the help of fully 3-D smooth particle magnetohydodynamic (SPMHD) simulations, we explore the nonlinear effects of magnetic fields (in close equipartition with the gas) in the structure of radiatively cooling,…

Astrophysics · Physics 2007-05-23 Elisabete M. de Gouveia Dal Pino , Adriano H. Cerqueira

The antiferromagnets with the time-reversal symmetry broken magnetic structures possess a finite spin splitting in the momentum space, and may contribute to a realization of a finite tunnel magnetoresistance (TMR) effect even with magnets…

Mesoscale and Nanoscale Physics · Physics 2025-09-29 Katsuhiro Tanaka , Yuta Toga , Susumu Minami , Satoru Nakatsuji , Takuya Nomoto , Takashi Koretsune , Ryotaro Arita

In this work we investigate the effect of the mechanical stress on the performance of magnetic tunnel junctions (MTJ) with perpendicular magnetic anisotropy. We developed a 4-point bending setup, that allows us to apply a constant stress…

Mesoscale and Nanoscale Physics · Physics 2018-06-08 Niklas Roschewsky , Sebastian Schafer , Frances Hellman , Vladimir Nikitin

A systematic, quantitative study of the effect of interface roughness and disorder on the magnetoresistance of FeCo$|$vacuum$|$FeCo magnetic tunnel junctions is presented based upon parameter-free electronic structure calculations. Surface…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 P. X. Xu , V. M. Karpan , K. Xia , M. Zwierzycki , I. Marushchenko , P. J. Kelly

The effects of Cu-doping on the structural, magnetic, and transport properties of La0.7Sr0.3Mn1-xCuxO3 (0 < x < 0.20) have been studied using neutron diffraction, magnetization and magnetoresistance (MR) measurements. All samples show the…

Materials Science · Physics 2009-11-11 M. S. Kim , J. B. Yang , Q. Cai , X. D. Zhou , W. J. James , W. B. Yelon , P. E. Parris , D. Buddhikot , S. K. Malik

The neutron shielding properties of high-density concrete and magnetite aggregates were evaluated using both experimental measurements and Monte Carlo simulations. Because these materials are commonly used in medical accelerator facilities,…

Medical Physics · Physics 2026-05-06 Kijun Park , Cynthia Keppel , Pawel Ambrozewicz , Kenneth Wright , Michael Kosinski

Ferroelectric tunnel junctions (FTJs) have attracted increasing research interest as a promising candidate for non-volatile memories. Recently, significant enhancements of tunneling electroresistance (TER) have been realized through…

The combination of spin-orbit coupling driven effects and multiferroic tunneling properties was explored experimentally in thin Pt/Co/BTO/LSMO multilayers. The presence of a Pt heavy metal allows for the spin current-induced magnetization…

Mesoscale and Nanoscale Physics · Physics 2024-11-01 Jakub Pawlak , Witold Skowroński , Piotr Kuświk , Félix Casanova , Marek Przybylski

We show a detailed investigation of the split Kondo effect in a carbon nanotube quantum dot with multiple gate electrodes. It is found that the splitting decreases for increasing magnetic field, to result in a recovered zero-bias Kondo…

Mesoscale and Nanoscale Physics · Physics 2011-06-01 A. Eichler , M. Weiss , C. Schönenberger

Scientific study of the effect of structural memory of nonequilibrium defective solids about the processing in magnetic field (the magnetic structural effect (MSE) was continued in this paper. The study was aimed to reveal the universal…

Materials Science · Physics 2009-11-11 F. Kh. Chibirova

We present the technical design and characteristics of the magnetic shield developed for 20" PMTs of the low-background OSIRIS facility. A ribbon of amorphous alloy with the extreme magnetic permeability was used in its design providing the…

Instrumentation and Detectors · Physics 2023-04-26 O. Smirnov , D. Korablev , A. Sotnikov , A. Stahl , J. Steinmann , V. Khudyakov , I. Avetissov , M. Zykova

We report the magnetotransport and $dc$ magnetic susceptibility of the polycrystalline samples of Pr$_{2}$Ba$_{4}$Cu$_{7}$O$_{15-\delta}$, to examine the effect of magnetic field on the superconducting phase of the metallic CuO double…

Magnesium diboride superconducting wires give the largest critical current density (Jc) when produced with iron sheath. Because iron is ferromagnetic, it is expected to improve the field dependence of Jc by shielding of the external field…

Superconductivity · Physics 2007-05-23 J. Horvat

We theoretically study the tunnel magnetoresistance (TMR) effect in (111)-oriented magnetic tunnel junctions (MTJs) with SrTiO$_{3}$ barriers, Co/SrTiO$_{3}$/Co(111) and Ni/SrTiO$_{3}$/Ni(111). Our analysis combining the first-principles…

Materials Science · Physics 2022-11-02 Keisuke Masuda , Hiroyoshi Itoh , Yoshiaki Sonobe , Hiroaki Sukegawa , Seiji Mitani , Yoshio Miura

Giant tunnel magnetoresistance (TMR) ratios of 417% at room temperature (RT) and 914% at 3 K were demonstrated in epitaxial Fe/MgO/Fe(001) exchanged-biased spin-valve magnetic tunnel junctions (MTJs) by tuning growth conditions for each…

Magnetic tunnel junctions (MTJs) are key components of spintronic devices, such as magnetic random-access memories. Normally, MTJs consist of two ferromagnetic (FM) electrodes separated by an insulating barrier layer. Their key functional…

Materials Science · Physics 2024-09-06 Kartik Samanta , Yuan-Yuan Jiang , Tula R. Paudel , Ding-Fu Shao , Evgeny Y. Tsymbal

We investigate magnetoresistance in spin valves involving CoPd-contacted carbon nanotubes. Both temperature and bias voltage dependence clearly indicate tunneling magnetoresistance as the origin. We show that this effect is significantly…

Mesoscale and Nanoscale Physics · Physics 2016-06-01 Caitlin Morgan , Maciej Misiorny , Dominik Metten , Sebastian Heedt , Thomas Schäpers , Claus M. Schneider , Carola Meyer