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Title: Effect of magnetic fields on spin glass dynamics

Abstract

The effects of a magnetic field on spin glass dynamics are explored for a Cu0.887Mn0.113 thin film of thickness L = 20 nm in a multilayer configuration. An experimental protocol removes uncertainties associated with the time dependence of the field-cooled magnetization MFC(t,T). Activated dynamics is exhibited after the spin glass correlation length ξ(t,T) has reached L, creating a quasiequilibrium state. Here, the activation energy depends upon the strength of the magnetic field H. The magnitude of the activation energy diminishes as H2, the coefficient of which is proportional to the number of correlated spins. A quantitative fit requires a “pancakelike” correlated region, associated with the T = 0 phase transition for a spin glass in D = 2 dimensions.

Authors:
 [1];  [2]; ORCiD logo [1]
  1. Univ. of Texas, Austin, TX (United States)
  2. Univ. of Minnesota, Minneapolis, MN (United States)
Publication Date:
Research Org.:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1594029
Alternate Identifier(s):
OSTI ID: 1374226
Grant/Contract Number:  
SC0013599
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 5; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; spin glasses; thin film multilayer; activated dynamics; frustrated magnetism; magnetic susceptibility; magnetic multilayers; magnetization measurements

Citation Formats

Zhai, Qiang, Harrison, David C., and Orbach, Raymond L. Effect of magnetic fields on spin glass dynamics. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.054408.
Zhai, Qiang, Harrison, David C., & Orbach, Raymond L. Effect of magnetic fields on spin glass dynamics. United States. doi:10.1103/PhysRevB.96.054408.
Zhai, Qiang, Harrison, David C., and Orbach, Raymond L. Mon . "Effect of magnetic fields on spin glass dynamics". United States. doi:10.1103/PhysRevB.96.054408. https://www.osti.gov/servlets/purl/1594029.
@article{osti_1594029,
title = {Effect of magnetic fields on spin glass dynamics},
author = {Zhai, Qiang and Harrison, David C. and Orbach, Raymond L.},
abstractNote = {The effects of a magnetic field on spin glass dynamics are explored for a Cu0.887Mn0.113 thin film of thickness L = 20 nm in a multilayer configuration. An experimental protocol removes uncertainties associated with the time dependence of the field-cooled magnetization MFC(t,T). Activated dynamics is exhibited after the spin glass correlation length ξ(t,T) has reached L, creating a quasiequilibrium state. Here, the activation energy depends upon the strength of the magnetic field H. The magnitude of the activation energy diminishes as H2, the coefficient of which is proportional to the number of correlated spins. A quantitative fit requires a “pancakelike” correlated region, associated with the T = 0 phase transition for a spin glass in D = 2 dimensions.},
doi = {10.1103/PhysRevB.96.054408},
journal = {Physical Review B},
number = 5,
volume = 96,
place = {United States},
year = {2017},
month = {8}
}

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