Faculty Publications

Title

Spin glass or random anisotropy?: The origin of magnetically glassy behavior in nanostructured Gd Al 2

Document Type

Conference

Journal/Book/Conference Title

Journal of Applied Physics

Volume

97

Issue

10

Abstract

Initially crystalline Gd Al2 was mechanically milled for long times to produce a highly chemically disordered phase with approximately 8-nm grains. Analysis of dc magnetization measurements using an Arrott plot and the approach to saturation suggest the presence of significant random anisotropy. ac susceptibility measurements showed that the shift in the peak temperature with frequency usually seen in magnetically glassy and superparamagnetic systems was virtually undetectable in the 10-1000-Hz frequency range. Based on these results, we believe that this material represents an interacting system with random anisotropy, where the anisotropy is the result of surface and interface asymmetries. © 2005 American Institute of Physics.

Original Publication Date

5-15-2005

DOI of published version

10.1063/1.1853003

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