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Large magnetoresistance effect controlled by electric field rather than magnetic field or electric current is a preferable routine for designing low power consumption magnetoresistance-based spintronic devices. Here we propose an…

介观与纳米尺度物理 · 物理学 2019-10-23 Yurong Su , Jia Zhang , Jing-Tao Lü , Jeongmin Hong , Long You

Magnetic tunnel junctions (MTJs) are key enablers of spintronic technologies used in a variety of applications including information storage, microwave generation and detection, as well as unconventional computing. Here, we present…

介观与纳米尺度物理 · 物理学 2025-03-12 Andrea Meo , Chengcen Sha , Emily Darwin , Riccardo Tomasello , Mario Carpentieri , Ilya N. Krivorotov , Giovanni Finocchio

Spin transfer torque magnetic random access memory (STT-MRAM) is a promising candidate for next generation memory as it is non-volatile, fast, and has unlimited endurance. Another important aspect of STT-MRAM is that its core component, the…

Perpendicular magnetic tunnel junction (pMTJ)-based true-random number generators (RNG) can consume orders of magnitude less energy per bit than CMOS pseudo-RNG. Here, we numerically investigate with a macrospin Landau-Lifshitz-Gilbert…

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

The conductance and tunnel magneto-resistance (TMR) of the double barrier magnetic tunnel junction with spin-valve sandwich (F/P/F) inserted between two insulating barrier, are theoretically investigated. It is shown, that resonant…

凝聚态物理 · 物理学 2009-11-10 N. Ryzhanova , G. Reiss , F. Kanjouri , A. Vedyayev

We demonstrate that thermally stable perpendicular magnetic tunnel junctions (pMTJs), widely used in spin-transfer torque magnetic random-access memory, can be actuated with nanosecond pulses to exhibit tunable stochastic behavior. This…

介观与纳米尺度物理 · 物理学 2026-01-15 Ahmed Sidi El Valli , Michael Tsao , Dairong Chen , Andrew D. Kent

Using a quantum theory including spin-splitting effect in diluted magnetic semiconductors, we study the dependence of tunneling magnetoresistance (TMR) on barrier thickness, temperature and applied voltage in GaMnAs/GaAs/GaMnAs…

介观与纳米尺度物理 · 物理学 2009-11-11 Alireza Saffarzadeh , Ali A. Shokri

Using a first-principles noncollinear wave-function-matching method, we studied the spin-transfer torques (STTs) in CoFe/Mg-B-O/CoFe(001) magnetic tunnel junctions (MTJs), where three different types of B-doped MgO in the spacer are…

介观与纳米尺度物理 · 物理学 2017-09-26 Ling Tang , Zhi-Jun Xu , Xian-Jun Zuo , Ze-Jin Yang , Qing-He Gao , Rong-Feng Linghu , Yun-Dong Guo

In this paper, we attempt the theoretical modeling of the magnetic tunnel junctions with embedded magnetic and nonmagnetic nanoparticles (NPs). A few abnormal tunnel magnetoresistance (TMR) effects, observed in related experiments, can be…

介观与纳米尺度物理 · 物理学 2018-07-04 Arthur Useinov , Niazbeck Useinov , Lin-Xiu Ye , Te-Ho Wu , Chih-Huang Lai

We report the possibility of achieving an order of magnitude reduction in the energy dissipation needed to write bits in perpendicular magnetic tunnel junctions (p-MTJs) by simulating the magnetization dynamics under a combination of…

介观与纳米尺度物理 · 物理学 2019-10-02 Austin Roe , Dhritiman Bhattacharya , Jayasimha Atulasimha

We have studied the magnetoresistance (TMR) of tunnel junctions with electrodes of La2/3Sr1/3MnO3 and we show how the variation of the conductance and TMR with the bias voltage can be exploited to obtain a precise information on the spin…

材料科学 · 物理学 2016-08-16 M. Bowen , A. Barthélémy , M. Bibes , E. Jacquet , J. -P. Contour , A. Fert , F. Ciccacci , L. Dùo , R. Bertacco

We investigated the relationship between the tunnel magnetoresistance (TMR) ratio and the electrode structure in MgO-barrier magnetic tunnel junctions (MTJs). The TMR ratio in a MTJ with Co40Fe40B20 reference and free layers reached 355% at…

材料科学 · 物理学 2015-06-25 Shoji Ikeda , Jun Hayakawa , Young Min Lee , Fumihiro Matsukura , Hideo Ohno

Theoretical investigations of spin transfer torque in magnetic tunnel junctions using the tight-binding model in the framework of non-equilibrium Green functions formalism are presented. We show that the behavior of the spin transfer torque…

材料科学 · 物理学 2009-11-13 M. Chshiev , I. Theodonis , A. Kalitsov , N. Kioussis , W. H. Butler

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…

介观与纳米尺度物理 · 物理学 2018-06-08 Niklas Roschewsky , Sebastian Schafer , Frances Hellman , Vladimir Nikitin

The exceptional properties of two-dimensional (2D) magnet materials present a novel approach to fabricate functional magnetic tunnel junctions (MTJ) by constructing full van der Waals (vdW) heterostructures with atomically sharp and clean…

We report a first-principles study on the tunnel magnetoresistance (TMR) and spin-injection efficiency (SIE) through phosphorene with nickel electrodes under the mechanical tension and bending on the phosphorene region. Both the TMR and SIE…

材料科学 · 物理学 2016-10-10 Mingyan Chen , Zhizhou Yu , Yiqun Xie , Yin Wang

Spintronic rf detectors were demonstrated, recently, for energy harvesting and wireless communication at low input power. Here we report on the optimization of the rectified output dc voltage using magnetic tunnel junctions (MTJ) with…

Three-terminal magnetic tunnel junction (MTJ), where non-volatile magnetization state can be switched via spin orbit torque (SOT), is attracting massive research interests since it is featured by high speed, low power, nearly unlimited…

应用物理 · 物理学 2025-06-13 Hongjie Ye , Zhaohao Wang

Black phosphorus is a promising material to serve as the barrier of magnetic tunnel junctions (MTJs) due to the weak van der Waals interlayer interactions. In particular, the special band features of black phosphorus may bring intriguing…

介观与纳米尺度物理 · 物理学 2022-03-18 Fang Henan , Li Qian , Xiao Mingwen , Liu Yan