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Title: Epitaxial Co 50Fe 50(110)/Pt(111) films on MgAl 2O 4 (001) and its enhancement of perpendicular magnetic anisotropy

Abstract

Perpendicular magnetic anisotropy (PMA) in magnetic thin films with low coercivity is desirable for magnetic memory devices. It has been discovered that a (111)-oriented or textured Pt seed layer can enhance PMA and is, therefore, commonly utilized in spintronic structures. We grow (111)-oriented Pt epitaxial films via off-axis sputtering on various substrates and investigate the optimal substrate and orientation for high quality, epitaxial growth. Our results show that Pt(111) epitaxial films grow remarkably well on MgAl 2O 4(001) with an exceptionally narrow X-ray diffraction rocking curve. This high-quality seed layer is determined to promote epitaxial growth of Pt/Co 50Fe 50/Pt trilayers with strong PMA comparable to many repeats of the magnetic multilayers reported previously. In addition, the Pt seed layer enhances the maximum thicknesses of Co 50Fe 50 that can still maintain PMA up to 1.07 nm.

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1]
  1. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Research Org.:
The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1594113
Alternate Identifier(s):
OSTI ID: 1512539
Report Number(s):
DOE-OSU-01304
Journal ID: ISSN 0021-8979
Grant/Contract Number:  
SC0001304
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 125; Journal Issue: 18; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Perpendicular magnetic anisotropy; CoFe epitaxial films

Citation Formats

Lee, Aidan J., Ahmed, Adam S., Guo, Side, Esser, Bryan D., McComb, David W., and Yang, Fengyuan. Epitaxial Co50Fe50(110)/Pt(111) films on MgAl2O4 (001) and its enhancement of perpendicular magnetic anisotropy. United States: N. p., 2019. Web. doi:10.1063/1.5093503.
Lee, Aidan J., Ahmed, Adam S., Guo, Side, Esser, Bryan D., McComb, David W., & Yang, Fengyuan. Epitaxial Co50Fe50(110)/Pt(111) films on MgAl2O4 (001) and its enhancement of perpendicular magnetic anisotropy. United States. https://doi.org/10.1063/1.5093503
Lee, Aidan J., Ahmed, Adam S., Guo, Side, Esser, Bryan D., McComb, David W., and Yang, Fengyuan. Tue . "Epitaxial Co50Fe50(110)/Pt(111) films on MgAl2O4 (001) and its enhancement of perpendicular magnetic anisotropy". United States. https://doi.org/10.1063/1.5093503. https://www.osti.gov/servlets/purl/1594113.
@article{osti_1594113,
title = {Epitaxial Co50Fe50(110)/Pt(111) films on MgAl2O4 (001) and its enhancement of perpendicular magnetic anisotropy},
author = {Lee, Aidan J. and Ahmed, Adam S. and Guo, Side and Esser, Bryan D. and McComb, David W. and Yang, Fengyuan},
abstractNote = {Perpendicular magnetic anisotropy (PMA) in magnetic thin films with low coercivity is desirable for magnetic memory devices. It has been discovered that a (111)-oriented or textured Pt seed layer can enhance PMA and is, therefore, commonly utilized in spintronic structures. We grow (111)-oriented Pt epitaxial films via off-axis sputtering on various substrates and investigate the optimal substrate and orientation for high quality, epitaxial growth. Our results show that Pt(111) epitaxial films grow remarkably well on MgAl2O4(001) with an exceptionally narrow X-ray diffraction rocking curve. This high-quality seed layer is determined to promote epitaxial growth of Pt/Co50Fe50/Pt trilayers with strong PMA comparable to many repeats of the magnetic multilayers reported previously. In addition, the Pt seed layer enhances the maximum thicknesses of Co50Fe50 that can still maintain PMA up to 1.07 nm.},
doi = {10.1063/1.5093503},
url = {https://www.osti.gov/biblio/1594113}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 18,
volume = 125,
place = {United States},
year = {2019},
month = {5}
}

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