Title :
Anisotropic hyperfine field fluctuation in La0.67Ca0.33Mn0.99Fe0.01O 3
Author :
Kim, Chul Sung ; Park, Seung-Iel ; Sur, Jung Chul ; Lee, Bo Wha
Author_Institution :
Dept. of Phys., Kookmin Univ., Seoul, South Korea
fDate :
9/1/1999 12:00:00 AM
Abstract :
Colossal magnetoresistance (CMR), Mossbauer spectra and neutron diffraction of the iron-doped manganite, La0.67Ca0.33 Mn0.9957Fe0.01O3, have been studied. The crystal structure is found to be cubic perovskite with the lattice parameter a0=3.868 Å. It is notable that the Curie temperature, TC=270 K, line broadening and 1,6 and 3,4 linewidth difference appear to suggest anisotropic hyperfine field fluctuation. The temperature dependence of the effective anisotropy energy is also found to decrease rapidly with increasing temperature
Keywords :
Curie temperature; Mossbauer effect; calcium compounds; colossal magnetoresistance; crystal structure; hyperfine interactions; lanthanum compounds; magnetic anisotropy; neutron diffraction; Curie temperature; La0.67Ca0.33Mn0.99Fe0.01 O3; Mossbauer spectra; anisotropic hyperfine field fluctuation; colossal magnetoresistance; crystal structure; cubic perovskite; effective anisotropy energy; lattice parameter; neutron diffraction; temperature dependence; Anisotropic magnetoresistance; Diffraction; Fluctuations; Frequency; Iron; Magnetic anisotropy; Neutrons; Perpendicular magnetic anisotropy; Powders; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
