Title :
Neutron diffraction and Mossbauer studies of the La/sub 0.67/Ba/sub 0.33/Mn/sub 0.99//sup 57/Fe/sub 0.01/O/sub 3/
Author :
Kang Ryong Choi ; Kim, S.J. ; In Bo Shim ; Chul Sung Kim
Author_Institution :
Dept. of Phys., Kookmin Univ., Seoul, South Korea
fDate :
March 30 2003-April 3 2003
Abstract :
In this paper, we elucidate the role of the manganese ion in the colossal magnetoresistance(CMR) effects by replacing the manganese ion in the CMR material with a similar transition metal ion Fe. The similar ionic radii of Fe/sup 3+/ and Mn/sup 3+/ mean that lattice distortion effects of the substitution may be ignored, and the electronic structure can be studied. Polycrystalline samples of La/sub 0.67/Ba/sub 0.33/Mn/sub 0.99//sup 57/Fe/sub 0.01/O/sub 3/ have been prepared with the aim of investigating the influence of the presence of a metal, which favors an antiferromagnetic coupling in the Mn-O layer.
Keywords :
Mossbauer effect; antiferromagnetic materials; band structure; barium compounds; colossal magnetoresistance; lanthanum compounds; manganese compounds; neutron diffraction; CMR; La/sub 0.67/Ba/sub 0.33/Mn/sub 0.99//sup 57/Fe/sub 0.01/O/sub 3/; Mn-O layer; Mossbauer effects; antiferromagnetic coupling; colossal magnetoresistance; electronic structure; lattice distortion effects; manganese ion; neutron diffraction; Barium; Colossal magnetoresistance; Iron; Magnetic materials; Magnetic properties; Manganese; Neutrons; Powders; Temperature distribution; X-ray diffraction;
Conference_Titel :
Magnetics Conference, 2003. INTERMAG 2003. IEEE International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7647-1
DOI :
10.1109/INTMAG.2003.1230640
