Accession Number : AD0623572

Title :   THE EFFECT OF PRESSURE ON THE FERROMAGNETIC PHASE TRANSITION OF EUO,

Corporate Author : MCGILL UNIV MONTREAL (QUEBEC) EATON ELECTRONICS RESEARCH LAB

Personal Author(s) : Stevenson,Richard ; Robinson,M. C.

Report Date : OCT 1965

Pagination or Media Count : 14

Abstract : The compressions of EuO up to 10,000 atm. have been measured at 296 K, 82 K and 4.2 K. The shift in temperature of the ferromagnetic phase transition has been measured as a function of pressure, by measuring the mutual inductance of a coil containing the solid. The transition occurs at about 72 K at 10,000 atm., which is about 5 K higher than the transition at atmospheric pressure. The results tend to substantiate a molecular field model for EuO proposed by McGuire and Shafer (J. Appl. Phys. 35:984, (1964)). An estimate is made of the variation of the exchange interaction parameter with lattice parameter; delta J/delta a = -0.62 K/A, where J refers to interactions between nearest magnetic neighbours. (Author)

Descriptors :   (*EUROPIUM COMPOUNDS, OXIDES), (*FERROMAGNETISM, EUROPIUM COMPOUNDS), (*PRESSURE, FERROMAGNETISM), PHASE STUDIES, COMPRESSIVE PROPERTIES, CRYSTAL LATTICES, TRANSITION TEMPERATURE, INDUCTANCE, HIGH PRESSURE, FIELD THEORY, MOLECULAR PROPERTIES, VOLUME, CANADA

Distribution Statement : APPROVED FOR PUBLIC RELEASE