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Title: Compensated Ferrimagnetism in the Zero-Moment Heusler Alloy Mn 3 Al

Abstract

While antiferromagnets have been proposed as components to limit stray magnetic fields, their inability to be spin polarized inhibits their use in spintronic devices. Compensated ferrimagnets are a unique solution to this dilemma since they have zero net moment, but their nonsymmetric density of states allows the achievement of high spin polarization. Density-functional theory predicts Mn3Al in the D0(3) structure to be fully compensated and retain half-metallicity at room temperature. In this work, 50-nm Mn3Al thin films are synthesized using molecular beam epitaxy and annealed at various temperatures in order to investigate their magnetic properties. Magnetometry measurements confirm the high Curie temperature of 605 K. Polarized-neutron reflectometry (PNR) indicates a low net magnetic moment, along with depth profiles of the structure and magnetization. From the PNR data, a saturation moment of 0.11 +/- 0.04 mu B/f.u. is extracted, confirming the nominal zero moment present in these thin films.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Energy Frontier Research Centers (EFRC) (United States). Center for the Computational Design of Functional Layered Materials (CCDM)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1415292
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Applied
Additional Journal Information:
Journal Volume: 7; Journal Issue: 6; Journal ID: ISSN 2331-7019
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Jamer, Michelle E., Wang, Yung Jui, Stephen, Gregory M., McDonald, Ian J., Grutter, Alexander J., Sterbinsky, George E., Arena, Dario A., Borchers, Julie A., Kirby, Brian J., Lewis, Laura H., Barbiellini, Bernardo, Bansil, Arun, and Heiman, Don. Compensated Ferrimagnetism in the Zero-Moment Heusler Alloy Mn3Al. United States: N. p., 2017. Web. doi:10.1103/PhysRevApplied.7.064036.
Jamer, Michelle E., Wang, Yung Jui, Stephen, Gregory M., McDonald, Ian J., Grutter, Alexander J., Sterbinsky, George E., Arena, Dario A., Borchers, Julie A., Kirby, Brian J., Lewis, Laura H., Barbiellini, Bernardo, Bansil, Arun, & Heiman, Don. Compensated Ferrimagnetism in the Zero-Moment Heusler Alloy Mn3Al. United States. doi:10.1103/PhysRevApplied.7.064036.
Jamer, Michelle E., Wang, Yung Jui, Stephen, Gregory M., McDonald, Ian J., Grutter, Alexander J., Sterbinsky, George E., Arena, Dario A., Borchers, Julie A., Kirby, Brian J., Lewis, Laura H., Barbiellini, Bernardo, Bansil, Arun, and Heiman, Don. Thu . "Compensated Ferrimagnetism in the Zero-Moment Heusler Alloy Mn3Al". United States. doi:10.1103/PhysRevApplied.7.064036.
@article{osti_1415292,
title = {Compensated Ferrimagnetism in the Zero-Moment Heusler Alloy Mn3Al},
author = {Jamer, Michelle E. and Wang, Yung Jui and Stephen, Gregory M. and McDonald, Ian J. and Grutter, Alexander J. and Sterbinsky, George E. and Arena, Dario A. and Borchers, Julie A. and Kirby, Brian J. and Lewis, Laura H. and Barbiellini, Bernardo and Bansil, Arun and Heiman, Don},
abstractNote = {While antiferromagnets have been proposed as components to limit stray magnetic fields, their inability to be spin polarized inhibits their use in spintronic devices. Compensated ferrimagnets are a unique solution to this dilemma since they have zero net moment, but their nonsymmetric density of states allows the achievement of high spin polarization. Density-functional theory predicts Mn3Al in the D0(3) structure to be fully compensated and retain half-metallicity at room temperature. In this work, 50-nm Mn3Al thin films are synthesized using molecular beam epitaxy and annealed at various temperatures in order to investigate their magnetic properties. Magnetometry measurements confirm the high Curie temperature of 605 K. Polarized-neutron reflectometry (PNR) indicates a low net magnetic moment, along with depth profiles of the structure and magnetization. From the PNR data, a saturation moment of 0.11 +/- 0.04 mu B/f.u. is extracted, confirming the nominal zero moment present in these thin films.},
doi = {10.1103/PhysRevApplied.7.064036},
journal = {Physical Review Applied},
issn = {2331-7019},
number = 6,
volume = 7,
place = {United States},
year = {2017},
month = {6}
}

Works referenced in this record:

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From ultrasoft pseudopotentials to the projector augmented-wave method
journal, January 1999