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Title: Thickness induced crossover from the ferromagnetic to cluster spin glass state in Cr{sub 70}Fe{sub 30} thin films

First five harmonics of the ac magnetic response were measuredas functions of temperature at different frequencies and with or without superposed dc magnetic field on Cr{sub 70}Fe{sub 30} thin films. An elaborate analysis of the linear susceptibility data reveals that (i) a well-defined paramagnetic (PM) to ferromagnetic (FM) phase transition, characterized by three-dimensional Heisenberg critical exponents, occurs for film thickness down to t≃ 90 nm, and (ii) the film with t≃40 nm exhibits experimental signatures in the critical region that are characteristic of both ferromagnets and spin glasses while the spin glass behavior dominates the FM one when t≃ 20 nm.
Authors:
; ;  [1]
  1. School of Physics, University of Hyderabad, Central University P.O., Hyderabad-500046, Telangana (India)
Publication Date:
OSTI Identifier:
22490201
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1665; Journal Issue: 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CHROMIUM BASE ALLOYS; FERROMAGNETIC MATERIALS; FERROMAGNETISM; FREQUENCY DEPENDENCE; HARMONICS; HEISENBERG MODEL; IRON ALLOYS; MAGNETIC FIELDS; PARAMAGNETISM; PHASE TRANSFORMATIONS; SPIN GLASS STATE; TEMPERATURE DEPENDENCE; THIN FILMS