Observation of a griffiths-like phase in the magnetocaloric compound Tb5Si2Ge2

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Magén, César (Author) Other; Algarabel, Pedro A. (Author) Other; Morellón, Luis (Author) Other; Araãjo, J. P. (Author) FCUP; Ritter, Clemens F. (Author) Other; Ibarra, Manuel Ricardo (Author) Other; Pereira, André M. (Author) FCUP; Sousa, João Bessa (Author) FCUP

Journal

Title: Physical Review Letters

Vol. 96

ISSN: 0031-9007

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 206 Citations

Scopus - 209 Citations

Other information

Authenticus ID: P-004-M6K

DOI: 10.1103/physrevlett.96.167201

Abstract (EN): The onset of a Griffiths-like phase has been observed in Tb5Si2Ge2 (T-C=110 K) by means of magnetic susceptibility and small-angle neutron scattering experiments. We show the growth of a ferromagnetic cluster system characterized by an inverse susceptibility exponent lower than unity at T-C < T < T-G approximate to 200 K. We suggest that the Griffiths-like state is originated by local disorder within the crystallographic structure, stabilized and enhanced by competing intralayer and interlayer magnetic interactions. Both factors thus promote segregation of nanometric regions with ferromagnetic interactions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4