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Title: Patterned growth of crystalline Y 3Fe 5O 12 nanostructures with engineered magnetic shape anisotropy

We demonstrate patterned growth of epitaxial yttrium iron garnet (YIG) thin films using lithographically defined templates on gadolinium gallium garnet substrates. The fabricated YIG nanostructures yield the desired crystallographic orientation, excellent surface morphology, and narrow ferromagnetic resonance (FMR) linewidth (~4 Oe). Shape-induced magnetic anisotropy is clearly observed in a patterned array of nanobars engineered to exhibit the larger coercivity (40 Oe) compared with that of continuous films. Both hysteresis loop and angle-dependent FMR spectra measurements indicate that the easy axis aligns along the longitudinal direction of the nanobars, with an effective anisotropy field of 195 Oe. Our work overcomes difficulties in patterning YIG thin films and provides an effective means to control their magnetic properties and magnetic bias conditions.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [2] ;  [1] ;  [3] ;  [2] ;  [1]
  1. Yale Univ., New Haven, CT (United States)
  2. Colorado State Univ., Fort Collins, CO (United States)
  3. The Ohio State Univ., Columbus, OH (United States)
Publication Date:
Grant/Contract Number:
SC0012670
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 25; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Colorado State Univ., Fort Collins, CO (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING
OSTI Identifier:
1473871

Zhu, Na, Chang, Houchen, Franson, Andrew, Liu, Tao, Zhang, Xufeng, Johnston-Halperin, E., Wu, Mingzhong, and Tang, Hong X.. Patterned growth of crystalline Y3Fe5O12 nanostructures with engineered magnetic shape anisotropy. United States: N. p., Web. doi:10.1063/1.4986474.
Zhu, Na, Chang, Houchen, Franson, Andrew, Liu, Tao, Zhang, Xufeng, Johnston-Halperin, E., Wu, Mingzhong, & Tang, Hong X.. Patterned growth of crystalline Y3Fe5O12 nanostructures with engineered magnetic shape anisotropy. United States. doi:10.1063/1.4986474.
Zhu, Na, Chang, Houchen, Franson, Andrew, Liu, Tao, Zhang, Xufeng, Johnston-Halperin, E., Wu, Mingzhong, and Tang, Hong X.. 2017. "Patterned growth of crystalline Y3Fe5O12 nanostructures with engineered magnetic shape anisotropy". United States. doi:10.1063/1.4986474. https://www.osti.gov/servlets/purl/1473871.
@article{osti_1473871,
title = {Patterned growth of crystalline Y3Fe5O12 nanostructures with engineered magnetic shape anisotropy},
author = {Zhu, Na and Chang, Houchen and Franson, Andrew and Liu, Tao and Zhang, Xufeng and Johnston-Halperin, E. and Wu, Mingzhong and Tang, Hong X.},
abstractNote = {We demonstrate patterned growth of epitaxial yttrium iron garnet (YIG) thin films using lithographically defined templates on gadolinium gallium garnet substrates. The fabricated YIG nanostructures yield the desired crystallographic orientation, excellent surface morphology, and narrow ferromagnetic resonance (FMR) linewidth (~4 Oe). Shape-induced magnetic anisotropy is clearly observed in a patterned array of nanobars engineered to exhibit the larger coercivity (40 Oe) compared with that of continuous films. Both hysteresis loop and angle-dependent FMR spectra measurements indicate that the easy axis aligns along the longitudinal direction of the nanobars, with an effective anisotropy field of 195 Oe. Our work overcomes difficulties in patterning YIG thin films and provides an effective means to control their magnetic properties and magnetic bias conditions.},
doi = {10.1063/1.4986474},
journal = {Applied Physics Letters},
number = 25,
volume = 110,
place = {United States},
year = {2017},
month = {6}
}