Work

Extracting free-energy landscape of AgMn spin-glass thin films with 1/ f resistance fluctuations

Year: 2024

Type: article

Abstract: The temperature-dependent $1/f$ noise is reported for AgMn (12 at. %) thin films with multiple thicknesses ranging from 15 to 80 nm. A significant increase in the noise magnitude occurs in the spin-glass state. Analysis of the temperature-dependent exponent provides information on the energy barrier distribution and height, which in turn are related to the spin-glass coherence length. We compare our results with those obtained previously on CuMn (13.5 at. %) thin films with similar thicknesses. We observe a similar trend of the increase of the barrier height with respect to thickness, but with relatively lower values for the AgMn barriers as compared to CuMn.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.214205

Authors: Kan-Ting Tsai, E. Dan Dahlberg, Raymond L. Orbach

Institutions: University of Minnesota, The University of Texas at Austin

Language: English

Topic: Theoretical and Computational Physics

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green