Title :
Anisotropic in-field Mossbauer spectra for La13/Sr23/FeO2.96 above its charge disproportionation temperature
Author :
Yoon, Sunghyun ; Yang, Jeong-Su ; Kim, Chul Sung
Author_Institution :
Dept. of Phys., Gunsan Nat. Univ., South Korea
Abstract :
External field Mossbauer spectroscopy for La13/Sr23/FeO3-y is performed to see how the external magnetic field affects the charge disproportionation (CD) state above its transition temperature. The polycrystalline La13/Sr23/FeO3-y is prepared by the conventional solid-state reaction method. Hopping of an electron between neighboring Fe ions occurs in such a way that the hyperfine magnetic field at the 57Fe nucleus average out to zero. The thermally generated hopping of delocalized carriers is not influenced by the application of magnetic field. The magnetic moment and magnetic Zeeman component of the sample are also discussed.
Keywords :
Mossbauer effect; Zeeman effect; hopping conduction; lanthanum compounds; localised states; magnetic moments; strontium compounds; La0.33Sr0.67FeO2.96; anisotropic in-field Mossbauer spectra; charge disproportionation temperature; delocalized carriers; electron hopping; external magnetic field affects; hyperfine magnetic field; magnetic Zeeman component; magnetic moment; solid-state reaction method; transition temperature; Anisotropic magnetoresistance; Electrons; Iron; Magnetic anisotropy; Magnetic fields; Magnetic moments; Solid state circuits; Spectroscopy; Strontium; Temperature;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464487
