Strain induced perpendicular magnetic anisotropy in epitaxial <i>europium iron garnet</i> thin films

ORAL

Abstract

Epitaxial growth of rare earth iron garnet (REIG) films offers a unique opportunity to control the magnetic properties such as the magnetic anisotropy and Gilbert damping [1,2]. To achieve desired perpendicular magnetic anisotropy (PMA), for example, different REIG require suitable substrates to deliver either tensile or compressive strain due to different magnetostriction coefficients. In this work, we present an experimental study of the magnetic anisotropy in europium iron garnet (EuIG) thin films grown by pulsed laser deposition. Atomically flat EuIG films of varying thickness (10nm – 100nm) were deposited on (100)-oriented gadolinium gallium garnet substrates. All films show compressive strain as characterized by X-ray diffraction. The magnetometry and angular dependent ferromagnetic resonance results indicate correlation between PMA and strain on the EuIG lattice. PMA was corroborated by spin pumping and anomalous Hall effect experiments on Pt devices fabricated on the EuIG thin films.

1 Tang, C., Applied Physics Letters 108 (10), 102403 (2016).
2 Tang, C., Physical Review B 94 (14), 140403 (2016).

*This work is supported as part of SHINES, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award SC0012670.

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Presenters

  • Víctor H. Ortiz

    • Physics and Astronomy, University of Calirfornia, Riverside

Authors

  • Víctor H. Ortiz

    • Physics and Astronomy, University of Calirfornia, Riverside

  • Mohammed Aldosary

    • Physics and Astronomy, University of Calirfornia, Riverside
    • University of California, Riverside

  • Junxue Li

    • Univ of California - Riverside
    • Physics and Astronomy, University of Calirfornia, Riverside
    • Physics, Univ of California - Riverside
    • University of California, Riverside
    • Physics and Astronomy Department, University of California Riverside

  • Yawen Liu

    • University of California, Riverside
    • Physics and Astronomy, University of Calirfornia, Riverside
    • Department of Physics and Astronomy, Univ. of California Riverside
    • Univ of California - Riverside

  • Pathikumar Sellappan

    • Mechanical & Aerospace Engineering, University of California, San Diego

  • Chad Warren

    • Mechanical & Aerospace Engineering, University of California, San Diego

  • Javier Garay

    • Mechanical & Aerospace Engineering, University of California, San Diego
    • Department of Mechanical and Aerospace Engineering, University of California, San Diego

  • Jing Shi

    • Univ of California - Riverside
    • Physics and Astronomy, University of Calirfornia, Riverside
    • University of California, Riverside
    • Physics, Univ of California - Riverside
    • Physics and Astronomy Department, University of California Riverside