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Alloying Fe electrodes with V, through reduced FeV/MgO interface mismatch in epitaxial magnetic tunnel junctions with MgO barriers, notably suppresses both nonmagnetic (parallel) and magnetic (antiparallel) state 1/f noise and enhances…

材料科学 · 物理学 2019-08-15 D. Herranz , F. Bonell , A. Gomez-Ibarlucea , S. Andrieu , F. Montaigne , R. Villar1 , C. Tiusan , F. G. Aliev

The magnetism in SrFe2As2 can be suppressed by electron doping through a small substitution of Fe by Co or Ni, giving way to superconductivity. We demonstrate that a massive substitution of Fe by isovalent ruthenium similarly suppresses the…

超导电性 · 物理学 2009-06-16 W. Schnelle , A. Leithe-Jasper , R. Gumeniuk , U. Burkhardt , D. Kasinathan , H. Rosner

Substantial amounts of the transition metals Mn, Fe, Co, and Ni can be substituted for Li in single crystalline Li$_2$(Li$_{1-x}T_x$)N. Isothermal and temperature-dependent magnetization measurements reveal local magnetic moments with…

材料科学 · 物理学 2015-06-09 A. Jesche , L. Ke , J. L. Jacobs , B. Harmon , R. S. Houk , P. C. Canfield

Flexible electronics is an emerging field in many applications ranging from in vivo biomedical devices to wearable smart systems. The capability of conforming to curved surfaces opens the door to add electronic components to miniaturized…

Anisotropic magnetic and electronic transport measurements were carried out on large single crystals of Fe1-xCoxSb2 (0<= x <=1). The semiconducting state of FeSb2 evolves into metallic and weakly ferromagnetic by substitution of Fe with Co…

强关联电子 · 物理学 2009-11-13 Rongwei Hu , V. F. Mitrovic , C. Petrovic

Recently discovered 2D van der Waals magnetic materials, and specifically Iron-Germanium-Telluride ($\rm Fe_{5}GeTe_{2}$), have attracted significant attention both from a fundamental perspective and for potential applications. Key open…

We investigate spin-dependent conductance across a magnetic tunnel junction (MTJ) including a ferromagnetic insulating barrier. The MTJ consists of two half-metallic ferromagnetic La2/3Sr1/3MnO3 (LSMO) manganites as electrodes and La2NiMnO6…

应用物理 · 物理学 2022-12-09 M. Abbasi Eskandari , S. Ghotb , P. Fournier

Spintronics-based nonvolatile components in neuromorphic circuits offer the possibility of realizing novel functionalities at low power. Current-controlled electrical switching of magnetization is actively researched in this context.…

应用物理 · 物理学 2023-01-10 A. S. Goossens , M. A. T. Leiviskä , T. Banerjee

Surface oxidation of the bottom ferromagnetic (FM) electrode, one of the major detrimental factors to the performance of a Magnetic Tunnel Junction (MTJ), is difficult to avoid during the fabrication process of the MTJ's tunnel barrier.…

材料科学 · 物理学 2015-05-19 Wei Chen , Dao N. H. Nam , Jiwei Lu , Stuart A. Wolf

We demonstrate efficient current induced spin orbit torque switching in perpendicularly magnetized epitaxial MgO(001)//Pd/Co2FeAl/MgO heterostructures grown by magnetron sputtering. The advantage of such heterostructures for spin orbit…

介观与纳米尺度物理 · 物理学 2020-05-27 M. S. Gabor , T. Petrisor , M. Nasui , M. A. Nsibi , J. Nath , I. M. Miron

Altermagnetic (AM) materials have recently attracted significant interest due to the non-relativistic momentum-dependent spin splitting of their electronic band structure which may be useful for antiferromagnetic (AFM) spintronics. So far,…

材料科学 · 物理学 2024-09-04 Kartik Samanta , Ding-Fu Shao , Evgeny Y. Tsymbal

The possibility of half-metallic antiferromagnetism, a special case of ferrimagnetism with a compensated magnetization, in the diluted magnetic semiconductors is highlighted on the basis of the first principles electronic structure…

材料科学 · 物理学 2009-11-11 H. Akai , M. Ogura

The Technical Committee of the IEEE Magnetics Society has selected 7 research topics to develop their roadmaps, where major developments should be listed alongside expected timelines; (i) hard disk drives, (ii) magnetic random access…

Magnetic tunnel junction (MTJ) is the key component to enable information access and increasing number of MTJs is integrated to develop high-density spintronic devices. However, continuous miniaturization of the conventional MTJs is…

介观与纳米尺度物理 · 物理学 2026-04-17 Yue Zhao , Bin Xiao , Jiawei Liu , Hui Zeng , Jun Zhao

We report on the synthesis of single crystalline and polycrystalline samples of Ce$_{3-x}$Mg$_x$Co$_9$ solid solution ($0\leq x \lesssim 1.4$) and characterization of their structural and magnetic properties. The crystal structure remains…

Thermal-magnetic noise at ferromagnetic resonance (T-FMR) can be used to measure magnetic perpendicular anisotropy of nanoscale magnetic tunnel junctions (MTJs). For this purpose, T-FMR measurements were conducted with an external magnetic…

介观与纳米尺度物理 · 物理学 2015-05-13 Yongfeng Guan , Jonathan Z. Sun , Xin Jiang , Rai Moriya , Li Gao , Stuart S. P. Parkin

Based on high-throughput density functional theory calculations, we have found 49 ferromag-netic cases in FexN1-x (0<x<1) compounds, focusing especially on permanent magnet and giant magnetocaloric effect applications. It is found that 15…

材料科学 · 物理学 2025-08-25 Qiang Gao , Ergen Bao , Ijaz Shahid , Hui Ma , Xing-Qiu Chen

The straintronic magnetic tunnel junction (s-MTJ) is an MTJ whose resistance state can be changed continuously or gradually from high to low with a gate voltage that generates strain the magnetostrictive soft layer. This unusual feature,…

介观与纳米尺度物理 · 物理学 2025-03-04 Supriyo Bandyopadhyay

Magnetic tunnel junctions (MTJs) are basic building blocks for devices such as magnetic random access memories (MRAMs). The relevance for modern computation of non-volatile high-frequency memories makes ac-transport measurements of MTJs…

介观与纳米尺度物理 · 物理学 2017-02-08 Subir Parui , Mário Ribeiro , Ainhoa Atxabal , Amilcar Bedoya-Pinto , Xiangnan Sun , Roger Llopis , Fèlix Casanova , Luis E. Hueso

Mn site is substituted with closed shell ions (Al, Ga. Ti, Zr and a certain combination of Zr and Al) and also with Fe and Ru ions carrying the magnetic moment (S=5/2 and 2 respectively) at a fixed concentration of 5 at. %. Substitution did…

强关联电子 · 物理学 2007-05-23 L. Seetha Lakshmi , V. Sridharan , D. V. Natarajan , V. Sankara Sastry , T. S. Radhakrishnan