Kadau, Kai; Gruner, Markus; Entel, Peter; Kreth, Magnus:
Modeling Structural and Magnetic Phase Transitions in Iron-Nickel Nanoparticles
In: Phase Transitions, Jg. 76 (2003), Heft 4 & 5, S. 355 - 365
2003Artikel/Aufsatz in Zeitschrift
Physik (inkl. Astronomie)
thp
Damit verbunden: 1 Publikation(en)
Titel:
Modeling Structural and Magnetic Phase Transitions in Iron-Nickel Nanoparticles
Autor*in:
Kadau, Kai;Gruner, MarkusUDE
GND
128899808
LSF ID
10281
ORCID
0000-0002-2306-1258ORCID iD
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Entel, PeterUDE
LSF ID
1127
Sonstiges
der Hochschule zugeordnete*r Autor*in
;
Kreth, Magnus
Erscheinungsjahr:
2003

Abstract:

Martensitic phase transformations and magnetovolume effects in iron-nickel alloys are intimately related. The term Invar is widely used to characterize the unusual physical properties accompanying structural and magnetic instabilities such as those observed in the vicinity of the critical composition Fe65Ni35. We discuss the crossover from bulk iron-nickel alloys to nanoparticles with respect to structural and magnetic behavior. By employing molecular-dynamics and Monte Carlo methods, we find the absence of structural instabilities in defect-free particles, a linear scaling of the austenitic transformation temperature with the reciprocal cluster radius, as well as a decrease of the magnetic transition temperature with decreasing particle size.