Onset of valence and magnetic instabilities in the ferromagnetic semiconductor EuO at high pressures

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.1048· OSTI ID:6551942

Abd-Elmeguid, M M; Taylor, R D ^[1]

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1. Physics Division, MS K764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)

Hydrostatic high-pressure {sup 151}Eu Moessbauer measurements (0{le}{ital p}{le}31 GPa) on the ferromagnetic semiconductor EuO reveal, contrary to previous suggestions, no pronounced valence change of Eu (Eu{sup 2+}{r arrow}Eu{sup 3+}) even at highest pressures ({ital p}=31 GPa). The magnetic ground state becomes unstable above 23 GPa, where the pressure-induced variation of the Curie temperature is consistent with theoretical predictions based on the volume-dependent competition between {ital sf}-exchange interactions and {ital sf} hybridization.

• OSTI ID: 6551942
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:1; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CHALCOGENIDES
EUROPIUM 151
EUROPIUM COMPOUNDS
EUROPIUM ISOTOPES
EUROPIUM OXIDES
EXCHANGE INTERACTIONS
HYBRIDIZATION
INTERACTIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MAGNETIC PROPERTIES
MAGNETIC SEMICONDUCTORS
MATERIALS
MOESSBAUER EFFECT
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SEMICONDUCTOR MATERIALS
STABLE ISOTOPES
VALENCE