Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Spin Glass Behavior In Rusr2gd1.5ce0.5cu2 O10-δ
Author: Cardoso C.A.
Araujo-Moreira F.M.
Awana V.P.S.
Takayama-Muromachi E.
De Lima O.F.
Yamauchi H.
Karppinen M.
Abstract: The dynamics of the magnetic properties of polycrystalline polycrystalline RuSr2Gd1.5CeO.5Cu2 O10-δ (Ru-1222) have been studied by ac susceptibility and dc magnetization measurements, including relaxation and ageing studies. Ru-1222 is a reported magnetosuperconductor with Ru spins magnetic ordering at temperatures near 100 K and superconductivity in Cu-O2 planes below Tc∼40 K. The exact nature of Ru spins magnetic ordering is still being debated, and no conclusion has been reached yet. In this work, a frequency-dependent cusp was observed in Xac vs T measurements, which is interpreted as a spin glass transition. The change in the cusp position with frequency follows the Vogel-Fulcher law, which is commonly accepted to describe a spin-glass with magnetically interacting clusters. Such an interpretation is supported by thermoremanent magnetization (TRM) measurements at T=60 K. TRM relaxations are well described by a stretched exponential relation, and present significant aging effects.
Rights: aberto
Identifier DOI: 
Date Issue: 2003
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-0037222469.pdf77.1 kBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.