Electronic and transport properties of Heusler alloy based magnetic tunneling junctions: A first principles study

Bhattacharya, Joydipto; Chakrabarti, Aparna

doi:10.1016/j.commatsci.2022.111852

Cited by 7 publications

(1 citation statement)

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“…In 2022, Feng et al (2022) also studied the all-Heusler alloy MTJ CoFeTiSi/Fe 2 TiSi/CoFeTiSi system, and a high TMR ratio of 2.4 × 10 8 % was predicted. In 2023, Bhattacharya and Chakrabarti (2023) found a high TMR value of the order of 10 6 in MTJ Co 2 MnSb/TiCoSb/Co 2 MnSb using electronic structure calculations based on the density flood theory. By investigating theoretically all-Heusler alloy MTJ Co 2 MnSi/Ni 2 NiSi/Co 2 MnSi, Bai et al (2013) suggested future theoretical and experimental efforts in developing high-performance all-Heusler current-perpendicular-to-plane giant magnetoresistance junctions for the read heads of next-generation high-density hard disk drives.…”

Section: Introductionmentioning

confidence: 99%

First-principles study of the structure, magnetism, and electronic properties of the all-Heusler alloy Co2MnGe/CoTiMnGe(100) heterojunction

He,

Huang,

et al. 2024

Front. Chem.

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Based on first-principles calculations in the density functional theory, we systematically investigated the possible interface structure, magnetism, and electronic properties of the all-Heusler alloy Co2MnGe/CoTiMnGe(100) heterojunction. The calculation indicated that the Co2MnGe Heusler alloy is a half-metal with a magnetic moment of 4.97 μB. CoTiMnGe is a narrow-band gap semiconductor and may act as an ultra-sensitive photocatalyst. We cannot find an “ideal” spin-polarization of 100% in CoCo termination and MnGe termination. Due to the interface interaction, the direct magnetic hybridization or indirect RKKY exchange will be weakened, leading to an increase in the atomic magnetic moment of the interfacial layer. For eight possible heterojunction structures, the half-metallic gaps in the Co2MnGe bulk have been destroyed by the inevitable interface states. The spin-polarization value of 94.31% in the CoCo-TiGe-B heterojunction revealed that it is the most stable structure. It is feasible to search for high-performance magnetic tunnel junction by artificially constructing suitable all-Heusler alloy heterojunctions.

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Section: Introductionmentioning

confidence: 99%