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Bulk ¿nd Nano Manganite Materials

Autor B. M. Manohara
en Limba Engleză Paperback – 6 apr 2020
The prepared nano pervoskite samples shows paramagnetic behaviour in the compounds prepared by SS method, but when it is prepared by SC method, it becomes superparamagnetic due to a partial migration of divalent ions to different sites. Due to substitution of lead / barium / strontion, intra-sublattice interaction become comparable with inter-sublattice interaction. In such a situation disorder and frustration takes place in the spin subsystem leading to the various magnetic structures; ferrimagnetic order, local spin canting, antiferrimagentic order, re-entrant spin glass (RSG) and spin glass etc. The magnetic ordering in these compounds is based on the Neel¿s two sub-lattice model of magnetism. The addition of Ba / Sr / Pb ions forces the same number of other cations to the different magnetic sites as a result the magnetic moment of the previous site increases hence magnetization and magnetic moment increase due to pb2+ / Ba2+/ Sr2+. The curves shape shows superparamagnetic character of the investigated sample, with optimized saturation magnetization and almost zero coercivity values.
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Specificații

ISBN-13: 9786138928317
ISBN-10: 6138928318
Pagini: 112
Dimensiuni: 150 x 220 x 8 mm
Greutate: 0.19 kg
Editura: Scholars' Press

Notă biografică

Dr. B. M. Manohara is working as Assistant Professor & Head, Department of Physics, Government First Grade College and P.G. Centre, Davangere - 577004, Karnataka, India. He is teaching Physics since 2000 with 6 years of research experience. He was published more than 15 papers in International & National Journals and had a H-Index 4, I ¿ Index 2