Spontaneous magnetization in the presence of nanoscale inhomogeneities in diluted magnetic systems - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2012

Spontaneous magnetization in the presence of nanoscale inhomogeneities in diluted magnetic systems

Akash Chakraborty
  • Fonction : Auteur
R. Bouzerar
  • Fonction : Auteur
  • PersonId : 1154203
  • IdRef : 118640836
Georges Bouzerar

Résumé

The presence of nanoscale inhomogeneities has been experimentally evidenced in several diluted magnetic systems, which in turn often leads to interesting physical phenomena. However, a proper theoretical understanding of the underlying physics is lacking in most of the cases. Here, we present a detailed and comprehensive theoretical study of the effects of nanoscale inhomogeneities on the temperature-dependent spontaneous magnetization in diluted magnetic systems, which is found to exhibit an unusual and unconventional behavior. The effects of impurity clustering on the magnetization response have hardly been studied until now. We show that nanosized clusters of magnetic impurities can lead to drastic effects on the magnetization compared to that of homogeneously diluted compounds. The anomalous nature of the magnetization curves strongly depends on the relative concentration of the inhomogeneities as well as the effective range of the exchange interactions. In addition, we also provide a systematic discussion of the nature of the distributions of the local magnetizations.

Dates et versions

hal-01010120 , version 1 (19-06-2014)

Identifiants

Citer

Akash Chakraborty, Paul Wenk, R. Bouzerar, Georges Bouzerar. Spontaneous magnetization in the presence of nanoscale inhomogeneities in diluted magnetic systems. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2012, 86 (21), pp.214402. ⟨10.1103/PhysRevB.86.214402⟩. ⟨hal-01010120⟩

Collections

UGA CNRS NEEL
51 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More