Title :
Thermal diffusivity of Fe3-xZnxO4 at the Verwey transition
Author :
Salazar, A. ; Oleaga, A. ; Wiechec, A. ; Tarnawski, Z. ; Kozlowski, A.
Author_Institution :
Dept. Fisica Aplicada, Univ. del Pais Vasco, Bilbao, Spain
fDate :
7/1/2004 12:00:00 AM
Abstract :
Thermal diffusivity (D) measurements of Fe3-xZnxO4 single crystals in the vicinity of the Verwey transition (TV) have been performed through a photopyroelectric setup. The main features of D are the following: a decrease with increasing Zn content x, a different temperature dependence above and below TV for every sample, and a drastic reduction just at TV. These changes in the thermal diffusivity behavior have been explained in terms of different phonon scattering mechanisms.
Keywords :
ferrites; ferromagnetic materials; iron compounds; magnetic transitions; thermal diffusion; thermal variables measurement; zinc compounds; Fe3-xZnxO4; Verwey transition; magnetite; phonon scattering mechanisms; photopyroelectric setup; single crystals; thermal diffusivity; thermal variable measurements; zinc ferrites; Conductivity; Crystals; Electrons; Iron; Nuclear magnetic resonance; Performance evaluation; Physics; Temperature; X-ray scattering; Zinc; Magnetite; Verwey transition; thermal variable measurements; zinc ferrites;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.830190
