Accession Number : AD0700565

Title :   STUDIES OF THE IONIC FERROMAGNET (LaPb)MnO3. III. FERROMAGNETIC RESONANCE STUDIES,

Corporate Author : MANITOBA UNIV WINNIPEG DEPT OF PHYSICS

Personal Author(s) : Searle,C. W. ; Wang,S. T.

Report Date : 18 JUN 1969

Pagination or Media Count : 7

Abstract : Ferromagnetic resonance has been observed in single crystals of the family La(1-x)Pb(x)MnO3 with 0.25 < x < 0.45 from 13 to 25 GHz and in the temperature range from 77 to 430K. The line width exhibits a sharp minimum accompanied by an isotropic shift in the resonance line at a critical temperature, T(c). T(c) is dependent on the concentration of Mn(4+) and has been related to the Curie temperature. The shift in the peak of the resonance line at T(c) can be described by effects related to the formation of a spin-polarized conduction band. The line shape is asymmetric at high temperatures, about T(c), and at low temperatures, T about 77K. This asymmetric behavior of the line is probably due to transport properties of the conduction-band electrons. (Author)

Descriptors :   (*FERROMAGNETIC MATERIALS, *MAGNETIC RESONANCE), (*MANGANATES, MAGNETIC RESONANCE), MAGNETIC PROPERTIES, LANTHANUM COMPOUNDS, LEAD COMPOUNDS, SINGLE CRYSTALS, CRYSTAL LATTICES, CANADA

Subject Categories : Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE