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Title: Controlling and patterning the effective magnetization in Y 3Fe 5O 12 thin films using ion irradiation

Abstract

We report an approach to controlling the effective magnetization ( Meff), a combination of the saturation magnetization and uniaxial anisotropy, of the ferrimagnet Y 3Fe 5O 12 (YIG) using different species of ions: He + and Ga +. The effective magnetization can be tuned as a function of the fluence, with He + providing the largest effect. We quantified the change in effective magnetization through an angular dependence of the ferromagnetic resonance before and after irradiation. Increases in 4π Meff were observed to be as much as 400 G with only a 15% increase in Gilbert damping, α (from 8.2e-4 to 9.4e-4). This result was combined with a method for accurate ion pattering, a focused ion beam, providing a mechanism for shaping the magnetic environment with submicron precision. We observe resonance modes localized by ion patterning of micron-sized dots, whose resonances match well with micromagnetic simulations. Lastly, this technique offers a flexible tool for precision nanoscale control and characterization of the magnetic properties of YIG.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [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)
OSTI Identifier:
1499676
Alternate Identifier(s):
OSTI ID: 1411999
Grant/Contract Number:  
FG02-03ER46054; SC0001304
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 8; Journal Issue: 5; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Brangham, J. T., Meng, K. Y., Pelekhov, D. V., Yang, F. Y., Hammel, P. C., Ruane, W. T., and White, S. P. Controlling and patterning the effective magnetization in Y3Fe5O12 thin films using ion irradiation. United States: N. p., 2017. Web. doi:10.1063/1.5007058.
Brangham, J. T., Meng, K. Y., Pelekhov, D. V., Yang, F. Y., Hammel, P. C., Ruane, W. T., & White, S. P. Controlling and patterning the effective magnetization in Y3Fe5O12 thin films using ion irradiation. United States. doi:10.1063/1.5007058.
Brangham, J. T., Meng, K. Y., Pelekhov, D. V., Yang, F. Y., Hammel, P. C., Ruane, W. T., and White, S. P. Fri . "Controlling and patterning the effective magnetization in Y3Fe5O12 thin films using ion irradiation". United States. doi:10.1063/1.5007058. https://www.osti.gov/servlets/purl/1499676.
@article{osti_1499676,
title = {Controlling and patterning the effective magnetization in Y3Fe5O12 thin films using ion irradiation},
author = {Brangham, J. T. and Meng, K. Y. and Pelekhov, D. V. and Yang, F. Y. and Hammel, P. C. and Ruane, W. T. and White, S. P.},
abstractNote = {We report an approach to controlling the effective magnetization (Meff), a combination of the saturation magnetization and uniaxial anisotropy, of the ferrimagnet Y3Fe5O12 (YIG) using different species of ions: He+ and Ga+. The effective magnetization can be tuned as a function of the fluence, with He + providing the largest effect. We quantified the change in effective magnetization through an angular dependence of the ferromagnetic resonance before and after irradiation. Increases in 4πMeff were observed to be as much as 400 G with only a 15% increase in Gilbert damping, α (from 8.2e-4 to 9.4e-4). This result was combined with a method for accurate ion pattering, a focused ion beam, providing a mechanism for shaping the magnetic environment with submicron precision. We observe resonance modes localized by ion patterning of micron-sized dots, whose resonances match well with micromagnetic simulations. Lastly, this technique offers a flexible tool for precision nanoscale control and characterization of the magnetic properties of YIG.},
doi = {10.1063/1.5007058},
journal = {AIP Advances},
number = 5,
volume = 8,
place = {United States},
year = {2017},
month = {12}
}

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