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We have put into evidence the existence of an antiferromagnetic coupling between iron epilayers separated by a ZnSe crystalline semiconductor. The effect has been observed for ZnSe spacers thinner than 4 nm at room-temperature. The coupling…

The spin-driven component of electric polarization in a single crystal of multiferroic BiFeO$_{3}$ was experimentally investigated in pulsed high magnetic fields up to 41 T. Sequential measurements of electric polarization for various…

This work reports on the magnetic interlayer coupling between two amorphous CoFeB layers, separated by a thin Ru spacer. We observe an antiferromagnetic coupling which oscillates as a function of the Ru thickness x, with the second…

材料科学 · 物理学 2007-05-23 N. Wiese , T. Dimopoulos , M. Ruhrig , J. Wecker , H. Bruckl , G. Reiss

We theoretically study the electron transport properties in a ferromagnetic/normal/ferromagnetic tunnel junction, which is deposited on the top of a topological surface. The conductance at the parallel (\textbf{P}) configuration can be much…

介观与纳米尺度物理 · 物理学 2013-05-03 Jian-Hui Yuan , Yan Zhang , Jian-Jun Zhang , Ze Cheng

Interlayer exchange in synthetic antiferromagnets incorporating thin paramagnetic spacers can be controlled thermally. The spacer provides an additional ferromagnetic contribution that renormalizes the otherwise temperature-independent…

介观与纳米尺度物理 · 物理学 2025-12-12 O. Kozlov , V. Kalita , S. Reshetniak , A. Kravets , D. Polishchuk , V. Korenivski

We theoretically study the spin-dependent transport in a ferromagnet/super- conductor/ferromagnet double tunnel junction. The tunneling current in the antiferromagnetic alignment of the magnetizations gives rise to a spin imbalance in the…

凝聚态物理 · 物理学 2009-10-31 S. Takahashi , H. Imamura , S. Maekawa

We theoretically investigate the angular and spin dependent transport in normal-metal/helical-multiferroic/ferromagnetic heterojunctions. We find a tunneling anisotropic magnetoresistance (TAMR) effect due to the spiral magnetic order in…

介观与纳米尺度物理 · 物理学 2015-05-18 Chenglong Jia , Jamal Berakdar

A theoretical framework is proposed for the spin-current driven synchronized self-oscillations in ferromagnets in the spin Hall geometry. The spin current generated by the spin Hall effect in a bottom nonmagnetic heavy metal excites a…

介观与纳米尺度物理 · 物理学 2018-09-17 Tomohiro Taniguchi

We report an advanced organic spin-interface architecture with magnetic remanence at room temperature, constituted by metal phthalocyanine molecules magnetically coupled with Co layer(s), mediated by graphene. Fe- and Cu-phthalocyanines…

Recently we proposed a theory of point-contact spectroscopy and argued that the splitting of zero-bias conductance peak (ZBCP) in electron-doped cuprate superconductor point-contact spectroscopy is due to the coexistence of…

超导电性 · 物理学 2015-05-14 Pok-Man Chiu , C. S. Liu , W. C. Wu

We demonstrate that ferromagnetic and antiferromagnetic excitations can be triggered by the dynamical spin accumulations induced by the bulk and surface contributions of the spin Hall effect. Due to the spin-orbit interaction, a…

介观与纳米尺度物理 · 物理学 2016-12-28 F. S. M. Guimarães , S. Lounis , A. T. Costa , R. B. Muniz

We report on the first integration of an antiferromagnetic Heusler compound acting as a pinning layer into magnetic tunneling junctions. The antiferromagnet Ru$_2$MnGe is used to pin the magnetization direction of a ferromagnetic Fe layer…

材料科学 · 物理学 2017-08-02 Jan Balluff , Teodor Huminiuc , Markus Meinert , Atsufumi Hirohata , Günter Reiss

In recent years, the field of antiferromagnetic spintronics has been substantially advanced. Electric-field control is a promising approach to achieving ultra-low power spintronic devices via suppressing Joule heating. In this article,…

介观与纳米尺度物理 · 物理学 2021-08-11 Han Yan , Zexin Feng , Peixin Qin , Xiaorong Zhou , Huixin Guo , Xiaoning Wang , Hongyu Chen , Xin Zhang , Haojiang Wu , Chengbao Jiang , Zhiqi Liu

We report on the experimental observation of thermoelectric currents in superconductor-ferromagnet tunnel junctions in high magnetic fields. The thermoelectric signals are due to a spin-dependent lifting of particle-hole symmetry, and are…

超导电性 · 物理学 2016-03-03 S. Kolenda , M. J. Wolf , D. Beckmann

We have measured the tunnelling current in Nb/Nb$_x$O$_y$/Ni planar tunnel junctions at different temperatures. The junctions are in the intermediate transparency regime. We have extracted the current polarization of the metal/ferromagnet…

超导电性 · 物理学 2009-11-13 E. M. González , A. D. Folgueras , R. Escudero , J. Ferrer , F. Guinea , J. L. Vicent

Magnetic order typically disrupts superconductivity, reducing the supercurrent. Here, we show that chiral antiferromagnetism, with non-relativistic spin-split bands and distinctive valley-locked spin texture, can instead significantly…

超导电性 · 物理学 2026-02-26 Jin-Xing Hou , Hai-Peng Sun , Björn Trauzettel , Song-Bo Zhang

We report magnetoresistance for current flow through iron/topological insulator (Fe/TI) and Fe/evaporated-oxide/TI contacts when a magnetic field is used to initially orient the magnetic alignment of the incorporated ferromagnetic Fe bar,…

介观与纳米尺度物理 · 物理学 2016-08-24 Sarmita Majumder , Samaresh Guchhait , Rik Dey , Leonard Franklin Register , Sanjay K. Banerjee

The quest to understand correlated electronic systems has pushed the frontiers of experimental measurements toward the development of new experimental techniques and methodologies. Here we use a novel home-built uniaxial-strain device…

强关联电子 · 物理学 2019-04-30 Mariam Kavai , Ioannis Giannakis , Justin Leshen , Joel Friedman , Pawel Zajdel , Pegor Aynajian

It is shown that interlayer spin-singlet Cooper pairing is induced by magnetic interactions in a metallic antiferromagnet of stacked conductive layers in which each layer is ferromagnetically polarized and they order antiferromagnetically…

超导电性 · 物理学 2007-05-23 Hiroshi Shimahara

The correlation between the magnetic moment in ferromagnetic alloys and the tunneling spin polarization in ferromagnet-insulator-superconductor tunneling experiments has been a mystery. The measured spin polarization for Fe, Co, Ni, and…

材料科学 · 物理学 2009-10-31 Tat-Sang Choy , Jian Chen , Selman Hershfield
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