Magnetic properties of low-moment ferrimagnetic Heusler Cr2CoGa thin films grown by molecular beam epitaxy

Jamer, Michelle E.; Sterbinsky, George E.; Stephen, Gregory M.; DeCapua, Matthew C.; Player, Gabriel; Heiman, Don

doi:10.1063/1.4966634

Title: Magnetic properties of low-moment ferrimagnetic Heusler Cr₂CoGa thin films grown by molecular beam epitaxy

Journal Article · Mon Oct 31 00:00:00 EDT 2016 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4966634· OSTI ID:1377595

^[1]; Sterbinsky, George E. ^[2]; Stephen, Gregory M. ^[3];

^[3]; Player, Gabriel ^[3]; Heiman, Don ^[3]

National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; Northeastern Univ., Boston, MA (United States). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Northeastern Univ., Boston, MA (United States). Dept. of Physics

Recently, theorists have predicted many materials with a low magnetic moment and large spin-polarization for spintronic applications. These compounds are predicted to form in the inverse Heusler structure; however, many of these compounds have been found to phase segregate. In this study, ordered Cr₂CoGa thin films were synthesized without phase segregation using molecular beam epitaxy. The present as-grown films exhibit a low magnetic moment from antiferromagnetically coupled Cr and Co atoms as measured with superconducting quantum interface device magnetometry and soft X-ray magnetic circular dichroism. Electrical measurements demonstrated a thermally-activated semiconductor-like resistivity component with an activation energy of 87 meV. Finally, these results confirm spin gapless semiconducting behavior, which makes these thin films well positioned for future devices.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

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

Grant/Contract Number:: AC02-06CH11357; AC02-98CH10886; ECCS-1402738

OSTI ID:: 1377595

Alternate ID(s):: OSTI ID: 1330592

Journal Information:: Applied Physics Letters, Vol. 109, Issue 18; ISSN 0003-6951

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

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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Surface half-metallicity in the Heusler alloy Cr2CoGa with low magnetic moment Zheng, Anmin; Huang, Hai; Gao, Guoying Journal of Materials Science, Vol. 53, Issue 11 https://doi.org/10.1007/s10853-018-2154-2	journal	February 2018
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Simulation study of ballistic spin-MOSFET devices with ferromagnetic channels based on some Heusler and oxide compounds Graziosi, Patrizio; Neophytou, Neophytos Journal of Applied Physics, Vol. 123, Issue 8 https://doi.org/10.1063/1.5011328	journal	February 2018
Large tunnel magnetoresistance and temperature-driven spin filtering effect based on the compensated ferrimagnetic spin gapless semiconductor Ti ₂ MnAl Han, Jiangchao; Gao, Guoying Applied Physics Letters, Vol. 113, Issue 10 https://doi.org/10.1063/1.5047151	journal	September 2018
Simulation study of ballistic spin-MOSFET devices with ferromagnetic channels based on some Heusler and oxide compounds Graziosi, Patrizio; Neophytou, Neophytos arXiv https://doi.org/10.48550/arxiv.1803.01789	text	January 2018

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Title: Magnetic properties of low-moment ferrimagnetic Heusler Cr2CoGa thin films grown by molecular beam epitaxy

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Title: Magnetic properties of low-moment ferrimagnetic Heusler Cr₂CoGa thin films grown by molecular beam epitaxy