Moment-volume instabilities in TixFe100-x alloys with compositions around the C14 laves phase TiFe2 *
Tieftemperaturphysik, Universität Duisburg, 47048
Corresponding author: a email@example.com
Accepted: 17 April 1998
Published online: 15 October 1998
We measured the thermal expansion and the specific heat of TixFe100-x alloys with x = 30.5, 32.5 and 35, all with hexagonal C14 laves phase structure (MgZn2) like TiFe2, and determine the temperature dependence of the magnetic contributions to the thermal expansion and the specific heat cmag. For fixed composition and show the same type of behavior, demonstrating that both anomalies are of the same microscopic nature. They originate from moment-volume fluctuations (antiferromagnetic Invar-effect) as a comparison with total energy calculations as a function of atomic volume and moment for TiFe2 reveals.
PACS: 75.25.+z – Spin arrangements in magnetically ordered materials / 75.30.Kz – Magnetic phase boundaries / 75.10.Lp – Band and itinerant models
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1998