Spin-glass behaviour in Pr0.7Ca0.3CoO3 and Nd0.7Ca0.3CoO3

Kundu, Asish K; Nordblad, P; Rao, C N R

dc.contributor.author	Kundu, Asish K
dc.contributor.author	Nordblad, P
dc.contributor.author	Rao, C N R
dc.date.accessioned	2012-11-30T11:29:30Z
dc.date.available	2012-11-30T11:29:30Z
dc.date.issued	2006-03
dc.identifier	0022-4596	en_US
dc.identifier.citation	Journal of Solid State Chemistry 179(3), 923-927 (2006)	en_US
dc.identifier.uri	https://libjncir.jncasr.ac.in/xmlui/10572/1137
dc.description	Restricted Access	en_US
dc.description.abstract	With a view to investigate the effect of small size of A-site cations on the magnetic properties of the rare earth cobaltates, Ln1−xAxCoO3 (Ln=rare earth, A=alkaline earth), we have investigated Pr0.7Ca0.3CoO3 and Nd0.7Ca0.3CoO3 in detail. For this purpose, we have carried out low-field DC magnetization and ac susceptibility measurements including a study of magnetic relaxation and memory effects. Both Pr0.7Ca0.3CoO3 and Nd0.7Ca0.3CoO3 show frequency-dependent transitions at 70 and 55 K respectively in the ac susceptibility data, due to the onset of spin-glass like behavior. Their relaxation behavior exhibits aging effects. In addition, memory effects are found in the magnetization behavior. These characteristics establish spin-glass behavior in both these cobaltates, a behavior that is distinctly different from that of La0.7Ca0.3CoO3 and La0.5Sr0.5CoO3 which show well-defined ferromagnetic transitions, albeit without long-range ordering.	en_US
dc.description.uri	http://dx.doi.org/10.1016/j.jssc.2005.12.014	en_US
dc.language.iso	en	en_US
dc.publisher	Elsevier Inc	en_US
dc.rights	© 2006 Elsevier Inc	en_US
dc.subject	Rare earth cobaltates	en_US
dc.subject	Magnetic properties	en_US
dc.subject	Spin-glasses	en_US
dc.title	Spin-glass behaviour in Pr0.7Ca0.3CoO3 and Nd0.7Ca0.3CoO3	en_US
dc.type	Article	en_US