Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/97794
Type: Artigo de periódico
Title: Heuristic Model For Magnetic-nonmagnetic Transitions In Intermediate-valence Systems
Author: Da Silva C.E.T.G.
Abstract: We present a simple conceptual discussion of the competition between hybridization and exchange in the problem of magnetic-nonmagnetic transitions in intermediate-valence systems. Two atomic-like calculations are presented: a singlet-doublet and a doublet-doublet level systems. A phenomenological ferromagnetic coupling is introduced. In the singlet-doublet case, three distinct phases are possible: paramagnetic, induced ferromagnetic, and ferromagnetic, depending on the values of the parameters. Results for the enhanced susceptibility are also presented. In the doublet-doublet case, two phases occur, para- and ferromagnetic. The valence change upon ordering is discussed. We argue that not only the "magnetic" character of the configuration, but also the relative strength of the local-moment quenching component of the hybridization potential and of the exchange interaction, are important in determining the existence of a spontaneously polarized phase. © 1979 The American Physical Society.
Editor: 
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.19.3656
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-4243794798&partnerID=40&md5=dc15a434a8ae266337666141708589e8
Date Issue: 1979
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
2-s2.0-4243794798.pdf377 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.