FERROMAGNETISM IN EuH$sub 2$

Journal Article · Sun Apr 15 04:00:00 EST 1962 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.126.537· OSTI ID:4832007

Zanowick, R L; Wallace, W E

Magnetic measurements are made on a Eu-H sample of composition EuH/sub 1.86/, from 4.2 to 300 deg K. The magnetizationtemperature data for the sample indicate a Curie point at 24 deg K. Field dependency studies in the liquid helium range reveal saturation effects and remanence, confirming that EuH/sub 1.86/ is ferromagnetic at these temperatures. The observed saturation moment at 4.2 deg K is approximates 6.0 mu /sub B/ (Bohr magnetons) per Eu atom. For T > 30 deg K the susceptibility shows a Curie-Weiss dependence on temperature and the effective moment is 8.4 mu /sub B/ per Eu atom. EuH/sub 2/, the saturated hydride of Eu, exhibits magnetic ordering at low temperatures. As the hydrogen- saturated metals lack conduction electrons, the coupling between the localized 4f electrons is expected to be very weak and magnetic ordering is expected to occur only at very low temperatures if at all. Thus the behavior of EuH/sub 1.86/ is not in keeping with expectation. The coupling mechanism may be caused by direct overlap of the 4f orbitals. (auth)

• Research Organization: Univ. of Pittsburgh
• NSA Number: NSA-16-018066
• OSTI ID: 4832007
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 126; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

COUPLING
ELECTRONS
EUROPIUM HYDRIDES
FERROMAGNETIC MATERIALS
INTERACTIONS
LOW TEMPERATURE
MAGNETIC FIELDS
MEASURED VALUES
MECHANICS
METALS, CERAMICS, AND OTHER MATERIALS
ORBITS
SUSCEPTIBILITY
TEMPERATURE