Accession Number:

AD0435887

Title:

SPIN WAVES IN THE SPIN-FLOP PHASE OF AN ANTIFERROMAGNET, AND METASTABILITY OF THE SPIN-FLOP TRANSITION

Descriptive Note:

Corporate Author:

PENNSYLVANIA UNIV PHILADELPHIA

Personal Author(s):

• Wang, Yung-Li
• Callen, Herbert B.

Report Date:

1964-03-01

Pagination or Media Count:

16.0

Abstract:

The spin-flop transition in a uniaxial antiferromagnet defines three critical fields that of the true thermodynamic transition and those limiting the local stability of antiferromagnetic and spin-flop phases. The latter two are calculated by a spin-wave analysis. The results are in qualitative agreement with the hysteresis observed by Schelleng and Friedberg in the spin-flop transition in manganese bromide. The spin-wave spectrum of the spin-flop phase is given, and the magnetization in the spin-flop phase is found to increase more rapidly that linearly with field because of quantum corrections absent in molecular field theory.

Descriptors:

• *FERROMAGNETISM
• *SPINNING(MOTION)
• MAGNETIC PROPERTIES
• STABILITY
• THERMODYNAMICS
• MANGANESE COMPOUNDS
• CONFIGURATIONS
• BROMIDES
• HYSTERESIS
• MAGNETIC FIELDS
• LOW TEMPERATURE
• ELECTROMAGNETIC RADIATION

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE