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Many Heusler compounds are predicted to be ferromagnetic half metals in the bulk, which makes them promising compounds for spintronics. However, for devices the transport spin polarization at specific interfaces requires optimization. We…

Mesoscale and Nanoscale Physics · Physics 2019-04-18 C. Lidig , J. Cramer , L. Weißhoff , T. R. Thomas , T. Kessler , M. Kläui , M. Jourdan

Ferric oxide (Fe2O3) thin films were fabricated on amorphous nonconductive and FTO conductive glass substrates starting from iron acetate nanoparticles by the doctor blade and the spin coating techniques. Thin films of Fe2O3 with and…

In this article, we investigated the effect of Cr substitution in place of Fe on the structural, magnetic and transport properties of $\mathrm{Co_2FeSi}$ alloy. A comprehensive structural analysis is done using X-ray diffraction (XRD) and…

Materials Science · Physics 2018-11-14 Deepika Rani , Jiban Kangsabanik , K. G. Suresh , N. Patra , D. Bhattacharyya , S. N. Jha , Aftab Alam

Half-Heusler YPtSb thin films were fabricated by magnetron co-sputtering method on MgO-buffered SiO2/Si(001) substrates. X-ray diffraction pattern and Energy dispersive X-ray spectroscopy confirmed the high-quality growth and stoichiometry.…

Materials Science · Physics 2012-11-26 Wenhong Wang , Yin Du , Enke Liu , Zhongyuan Liu , Guangheng Wu

Half-Heusler compounds exhibit a remarkable variety of emergent properties such as heavy-fermion behaviour, unconventional superconductivity and magnetism. Several of these compounds have been predicted to host topologically non-trivial…

First principles studies were performed in order to find out the possibility of inducing half-metallicity in Heusler Compound CoFeMnSb, by means of alloying it with 3d-transition metal elements. Proper alloying element is selected through…

Materials Science · Physics 2019-05-15 Upendra Kumar , P. V. Sreenivasa Reddy , Satadeep Bhattacharjee , Seung-Cheol Lee

Multifunctional materials composed of ultrathin magnetic films with perpendicular magnetic anisotropy combined with ferroelectric substrates represent a new approach toward low power, fast, high density spintronics. Here we demonstrate…

Mesoscale and Nanoscale Physics · Physics 2016-01-08 Daniel B. Gopman , Cindi L. Dennis , Andrew P. Chen , Yury L. Iunin , Peter Finkel , Margo Staruch , Robert D. Shull

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…

This paper reports an effective method of stabilizing ultrathin Silver (Ag) films on substrates using a filler metal (Zn). Ag films with a thickness < 15 nm were deposited by DC magnetron sputtering above a Zn filler metal on glass, quartz,…

Scanning Tunneling Microscopy (STM) has been used to study the morphology of Ag, Pb and Pb/Ag bilayer films fabricated by quench condensation of the elements onto cold (T=77K), inert and atomically flat Highly Oriented Pyrolytic Graphite…

Other Condensed Matter · Physics 2009-11-10 Zhenyi Long , James M. Valles

Thin films of the ferromagnet Fe$_2$Ge were grown via molecular beam epitaxy, and their electrical and magneto-transport properties measured for the first time. X-ray diffraction and vibrating sample magnetometry measurements confirmed the…

We study room-temperature generation and detection of pure spin currents using lateral spin-valve devices with Heusler-compound electrodes, Co$_{2}$FeSi (CFS) or Fe$_{3}$Si (FS). The magnitude of the nonlocal spin-valve (NLSV) signals is…

Mesoscale and Nanoscale Physics · Physics 2012-03-22 K. Hamaya , N. Hashimoto , S. Oki , S. Yamada , M. Miyao , T. Kimura

Electrical spin injection from the Heusler alloy Co_2MnGe into a p-i-n Al_0.1Ga_0.9As/GaAs light emitting diode is demonstrated. A maximum steady-state spin polarization of approximately 13% at 2 K is measured in two types of…

The phase immiscibility and the excellent matching between Ag(001) and Fe(001) unit cells (mismatch 0.8 %) make Fe/Ag growth attractive in the field of low dimensionality magnetic systems. Intermixing could be drastically limited at…

Materials Science · Physics 2009-11-10 S. Terreni , A. Cossaro , G. Gonella , L. Mattera , L. Duo' , F. Ciccacci , D. Cvetko , L. Floreano , A. Morgante , A. Verdini , M. Canepa

Topological materials, such as topological insulators (TIs), have great potential for ultralow power spintronic devices, thanks to their giant spin Hall effect. However, the giant spin Hall angle (${\theta}_{SH}$ > 1) is limited to a few…

Materials Science · Physics 2022-03-08 Takanori Shirokura , Tuo Fan , Nguyen Huynh Duy Khang , Tsuyoshi Kondo , Pham Nam Hai

We report the theoretical prediction of a new class of spintronic materials, namely bipolar magnetic semiconductor (BMS), which is also supported by our experimental data. BMS acquires a unique band structure with unequal band gaps for spin…

Applied Physics · Physics 2020-11-21 Jadupati Nag , Deepika Rani , Jiban Kangsabanik , P. D. Babu , K. G. Suresh , Aftab Alam

LaFeAsO1-xFx thin films were deposited successfully on (001)-oriented LaAlO3 and MgO substrates from stoichiometric LaFeAsO1-xFx polycrystalline targets with fluorine concentrations up to x = 0.25 by PLD. Room temperature deposition and…

Superconductivity · Physics 2009-11-13 E. Backen , S. Haindl , T. Niemeier , T. Freudenberg , J. Werner , G. Behr , L. Schultz , B. Holzapfel

Newly emerged materials from the family of Heuslers and complex oxides exhibit finite bandgaps and ferromagnetic behavior with Curie temperatures much higher than even room temperature. In this work, using the semiclassical…

Applied Physics · Physics 2018-03-06 Patrizio Graziosi , Neophytos Neophytou

It is shown by rigorous ab initio calculations that half-Heusler alloys of transition metals and $d^0$ metals, defined by the valence electronic configuration $ns^{1,2},(n-1)d^0$, can produce all kinds of half-metallic behavior including…

Materials Science · Physics 2017-02-28 S. Davatolhagh , A. Dehghan

Fueled by the 5G revolution, the demand for advanced radio frequency micro-electromechanical systems (MEMS) based on AlScN is growing rapidly. However, synthesizing high-quality, textured AlScN thin films is challenging. Current approaches…

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