The phase diagrams with influence of biquadratic exchange coupling on martensitic-austenitic transformations for core-surface nanoparticles
Küçük Resim Yok
Tarih
2015
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
ELSEVIER SCIENCE BV
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Recently, origin of the martensite-austenite transitions in core-surface type magnetic nanoparticles has been investigated theoretically and it has been indicated that repulsive biquadratic exchange coupling (K < 0.0) causes the coexisting martensite and austenite phases. In the present paper, the phase diagrams of homogeneous and composite nanoparticles in the k(B)T/J(0)-D/J(0) plane are studied for the presence and absence of attractive biquadratic exchange interaction in addition to repulsive biquadratic exchange interaction. Significant changes in the phase diagram points are discussed in the presence of martensitic and austenitic transformations. Four regions in the phase diagrams are found as second-order, martensitic-austenitic, T-cid and first-order phase transition regimes. (C) 2015 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
Phase diagrams, Core-surface nanoparticles, Martensitic/austenitic transitions
Kaynak
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
389
