Investigation of spin-glass behavior in the LnRu-1222 (Ln=Gd, Dy, Ho, Y) system

Authors :: Cardoso, C.A.
Araujo-Moreira, F.M.
Awana, V.P.S.
Takayama-Muromachi, E.
de Lima, O.F.
Yamauchi, H.
Karppinen, M.
Source :: Physica C. Aug2004, Vol. 408-410, p183-184. 2p.
Publication Year :: 2004
Abstract: The dynamics of the magnetic properties of polycrystalline RuSr2Ln1.5Ce0.5Cu2O10 (LnRu-1222, Ln=Gd, Y, Ho, Nd) have been studied by ac susceptibility. A frequency-dependent cusp was observed in <f>χac</f> vs. <f>T</f> measurements, which is interpreted as a spin-glass transition. These results are contrasted with the regular antiferromagnetic transition observed for YRu-1212. [Copyright &y& Elsevier]