B. M. Manohara

Bulk ¿nd Nano Manganite Materials

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Produktbeschreibung

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.

Produktdetails

• Verlag: Scholar's Press
• Seitenzahl: 112
• Erscheinungstermin: 6. April 2020
• Englisch
• Abmessung: 220mm x 150mm x 7mm
• Gewicht: 185g
• ISBN-13: 9786138928317
• ISBN-10: 6138928318
• Artikelnr.: 59385631

Autorenporträt

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