Effect of magnetic fields on spin glass dynamics

Zhai, Qiang; Harrison, David C.; Orbach, Raymond L.

doi:10.1103/PhysRevB.96.054408

Title: Effect of magnetic fields on spin glass dynamics

Journal Article · Mon Aug 07 00:00:00 EDT 2017 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.96.054408· OSTI ID:1594029

Zhai, Qiang ^[1]; Harrison, David C. ^[2];

^[1]

Univ. of Texas, Austin, TX (United States)
Univ. of Minnesota, Minneapolis, MN (United States)

The effects of a magnetic field on spin glass dynamics are explored for a Cu_0.887Mn_0.113 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 M_FC(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.

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Research Organization:: Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0013599

OSTI ID:: 1594029

Alternate ID(s):: OSTI ID: 1374226

Journal Information:: Physical Review B, Vol. 96, Issue 5; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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