MAGNETIC PROPERTIES OF RARE EARTH METALS AT VERY LOW TEMPERATURES. Period Covered May 1, 1956-July 31, 1957

Technical Report · Wed Jul 31 04:00:00 EDT 1957

OSTI ID:4348488

Leipfinger, H

The magnetic susceptibilities of the rare earth metals Ce, Pr, Nd, Sm, Dy, and Yb were measured from 293 deg K down to l.5 deg K. The general results indicate that, with the exception of Yb and possibly Eu (not yet measured) the ions, which constitute the lattice of the metal, are the same as in the salts or oxides. Yb is built up by divalent ions. The small magnetism allows not more than 2% Yb/sup 3+/ ions, and even this magnetism can be caused byimpurities. In the salts the deviations from the Curie law are caused by crystal field splitting of the electronic terms; in metals this splitting is, if it exists at all, weak, while exchange coupling brings in most cases either antiferromagnetism or ferromagnetism. Together with the measurements of other metals not yet finished, one can guess the rule that at very low temperatures the metals of the first half, Ce-Eu, are antiferromagnetic, the metals of the second half ferromagnetic. No coupling effects were observed in Pr and Yb, the latter being up by divalent ions. (auth)

• Research Organization: Munich. Physikalishes Institut der Technischen Hochschule
• NSA Number: NSA-12-001777
• OSTI ID: 4348488
• Report Number(s): AFOSR-TN-57-561; AD-136546
• Country of Publication: United States
• Language: English

Related Subjects

CERIUM
COUPLING
DYSPROSIUM
EUROPIUM
FERROMAGNETIC MATERIALS
IMPURITIES
INTERACTIONS
IONS
LATTICES
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETISM
MEASURED VALUES
NEODYMIUM
OXIDES
PHYSICS
PRASEODYMIUM
RARE EARTHS
SALTS
SAMARIUM
SUSCEPTIBILITY
TEMPERATURE
YTTERBIUM