Gruner, Markus Ernst; Entel, Peter:
High-moment - low-moment description of magnetovolume effects in Y(MnxAl1-x)2 and YxSc1-xAl2
2002
In: Phase Transitions, Jg. 75 (2002), Heft 1 & 2, S. 221 - 230
Artikel/Aufsatz in Zeitschrift2002Physik
Titel:
High-moment - low-moment description of magnetovolume effects in Y(MnxAl1-x)2 and YxSc1-xAl2
Autor(in):
Gruner, Markus ErnstLSF; Entel, PeterLSF
Erscheinungsjahr
2002
DOI:
WWW URL

Abstract:

Based on the assumption of a high-moment-low-moment instability of the Mn atom, we construct a simple spin model with coupled magnetic and spatial degrees of freedom to describe the Laves phase systems Y(MnxAl1-x)2 and YxSc1-xMn2. Monte Carlo simulations of this model qualitatively reproduce anomalies observed in these materials like a discontinuous giant volume change and anomalous thermal expansion behavior.