Investigation Of Spin-glass Behavior In The Lnru-1222 (ln=gd, Dy, Ho, Y) System

The dynamics of the magnetic properties of polycrystalline RuSr 2Ln1.5Ce0.5Cu2O10 (LnRu-1222, Ln=Gd, Y, Ho, Nd) have been studied by ac susceptibility. A frequency-dependent cusp was observed in χac vs. T measurements, which is interpreted as a spin-glass transition. These results are contrasted with the regular antiferromagnetic transition observed for YRu-1212. © 2004 Elsevier B.V. All rights reserved.408-4101-4183184Felner, I., (1997) Phys. Rev. B, 55, p. 3374Bernhard, C., (1999) Phys. Rev. B, 59, p. 14099Živković, I., (2002) Phys. Rev. B, 65, p. 144420Cardoso, C.A., (2003) Phys. Rev. B, 67, p. 020407Mydosh, J.A., (1993) Spin Glasses: An Experimental Introduction, , London: Taylor & Franci