Growth, structural, and magnetic properties of single-crystal full-Heusler Co2TiGe thin films

Logan, J. A.; Brown-Heft, T. L.; Harrington, S. D.; Wilson, N. S.; McFadden, A. P.; Rice, A. D.; Pendharkar, M.; Palmstrøm, C. J.

doi:10.1063/1.4984311

Growth, structural, and magnetic properties of single-crystal full-Heusler Co₂TiGe thin films

Journal Article · Mon Jun 05 00:00:00 EDT 2017 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4984311· OSTI ID:1465336

^[1]; Brown-Heft, T. L. ^[2]; ^[2]; Wilson, N. S. ^[2]; McFadden, A. P. ^[3]; ^[2]; ^[3]; Palmstrøm, C. J. ^[4]

Univ. of California, Santa Barbara, CA (United States). Materials Dept.; University of California, Santa Barbara
Univ. of California, Santa Barbara, CA (United States). Materials Dept.
Univ. of California, Santa Barbara, CA (United States). Dept. of Electrical and Computer Engineering
Univ. of California, Santa Barbara, CA (United States). Materials Dept. Dept. of Electrical and Computer Engineering

This paper presents the growth, structural characterization, and measurement of magnetic properties of Co₂TiGe thin films grown by molecular beam epitaxy on insulating MgO (001) substrates and conductive lattice matched InAlAs/InGaAs/InAlAs epitaxial layers grown on n-InP (001) substrates. A GdAs diffusion barrier was used to minimize interfacial reactions during Co₂TiGe growth on InAlAs. The surface morphology, structural quality, and magnetic behavior were examined by reflection high-energy electron diffraction, scanning tunneling microscopy, X-ray diffraction, and superconducting quantum interference device magnetometry. The results reveal high quality Co₂TiGe thin films with a saturation magnetization of ~1.8 μ_B/formula unit and a Curie temperature of ~375 K. Finally, the magnetic easy axis was found to lie in the [110] direction but magnetometry also reveals that there is only a small difference in energy between the [110] and [010] magnetization directions.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, Santa Barbara, CA (United States)

Sponsoring Organization:: National Science Foundation (NSF) (United States); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0014388

OSTI ID:: 1465336

Alternate ID(s):: OSTI ID: 1366557

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 21 Vol. 121; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Growth, structural, and magnetic properties of single-crystal full-Heusler Co2TiGe thin films

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