Fe2MnGe: A Hexagonal Heusler Analogue

Published

August 20, 2018

Author(s)

S. Keshavarz, N. Naghibolashrafi, Michelle E. Jamer, K. Vinson, D. Mazumdar, Cindi L. Dennis, William D. Ratcliff, Julie Borchers, A. Gupta, P. LeClair

Abstract

Fe₂MnGe is a potential half-metallic full-Heusler L2₁ ferromagnetic compound with large spin polarization (approximately equal}97%) useful for various spintronic applications according to our first principles calculations using density functional theory. We therefore synthesized polycrystalline samples using arc-melting and post thermal treatments. our experimental investifations revealed that Fe₂MnGe crystallizes in a stable hexagonal DO₁₉ phase, with a high saturation magnetization of approximately 5_υB/f.u. at Τ = 5 K and an estimated Curie temperature of Τ_c505 K. Large magnetocrystalline anisotropy and the possibility of half-metallicity presents Fe₂MnGe as a candidate for spin-torque-transfer RAM and other magnetic memory applications. Although, no sample has shown the pure cubic phase during these investigations, the neutron diffraction investigations were suggestive of a low temperature cubic or tetragonal phase which can be achieved by structural transformations.

Citation

Journal of Alloys and Compounds

Volume

771

Pub Type

Journals

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Keywords

Heusler

Citation

Keshavarz, S. , Naghibolashrafi, N. , Jamer, M. , Vinson, K. , Mazumdar, D. , Dennis, C. , Ratcliff, W. , Borchers, J. , Gupta, A. and LeClair, P. (2018), Fe₂MnGe: A Hexagonal Heusler Analogue, Journal of Alloys and Compounds, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924663 (Accessed April 19, 2024)