Accession Number : AD0732905

Title :   Spectroscopic and Magnetic Study of the Rare Earth Orthoferrites.

Descriptive Note : Final rept. 19 Nov 68-30 Sep 71,

Corporate Author : STANFORD UNIV CALIF

Personal Author(s) : White,Robert L.

Report Date : 1971

Pagination or Media Count : 16

Abstract : The objective of the study was to understand the magnetic behavior of the rare earth orthoferrites at an atomic level. The properties to be explained include a strongly temperature-dependent magnetization, a spontaneous magnetization which may differ by as much as two orders of magnitude from one rare earth orthoferrite to the next, and spin reorientation transitions, in which the spontaneous moment rotates from one crystalling direction to another as temperature is changed. The technique of exploration has been spectroscopic; the energy levels of the rare earth ions and their variation with temperature and applied magnetic field are used to predict the macroscopic magnetic behavior of the whole material. (Author)

Descriptors :   (*FERRITES, MAGNETIC PROPERTIES), (*RARE EARTH COMPOUNDS, MAGNETIC PROPERTIES), TEMPERATURE, ELECTRON TRANSITIONS, ATOMIC ENERGY LEVELS, HOLMIUM COMPOUNDS, THULIUM COMPOUNDS, MAGNETIC MOMENTS, ZEEMAN EFFECT

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE