Cluster spin glass and superparamagnetism in RuSr2Eu1.5Ce0.5Cu2O10- (delta)

Authors

Rashmi Nigam, University of WollongongFollow
Alexey V. Pan, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

32365

Publication Details

Nigam, R., Pan, A. V. & Dou, S. Xue. (2010). Cluster spin glass and superparamagnetism in RuSr₂Eu_1.5Ce_0.5Cu₂O_{10- δ} . European Physical Journal B, Condensed Matter and Complex Systems, 74 (4), 429-436.

Abstract

We investigate in detail the dc magnetization and nonlinear ac susceptibility behavior of the superconducting ferromagnet RuSr₂Eu_1.5Ce_0.5Cu₂O_{10- δ} (Ru1222) to develop a comprehensive understanding of the spin glass and superparamagnetism in this material. The structural properties of the system result in the formation of magnetic (ferromagnetic) clusters of different sizes, shapes and properties. The magnetic clustering of the system leads to observation of various features in dc magnetization and ac susceptibility consistent with superparamagnetism and cluster spin glass states, which can coexist or stand alone, depending on the temperature range considered. Experimental results of magnetic measurements in combination with their analysis have enabled us to explain and distinguish these phenomena, as well as to propose a temperature dependent scenario of the system behavior.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/ARC/DP0770205