Thermodynamic properties of ferromagnets with uniaxial and biaxial anisotropy
Authors:
- Roman Micnas
Abstract
The thermodynamic properties of spin-one Heisenberg ferromagnets with uniaxial and biaxial anisotropy are investigated in the molecular field approximation (MFA) and random phase approximation (RPA). In MFA a full phase diagram comprising three lines of bicritical points, is obtained. Using the standard-basis operator method, the collective excitation spectrum is studied in detail; moreover the softening of the excitations at the phase boundaries is discussed. A self-consistent version of RPA with emphasis on the role of kinematic restrictions with regard to the standard-basis operators is analyzed. Moreover, the phase transitions are considered in the Ising model, where a line of tricritical points occurs, and the planar model, where a line of bicritical points, two lines of tricritical points and a line of triple points, occur. © 1977.
- Record ID
- UAMb587243d57b84dcda80ba887ebe18924
- Author
- Journal series
- Physica A-Statistical Mechanics and Its Applications, ISSN 0378-4371
- Issue year
- 1977
- Vol
- 89
- Pages
- 431-460
- ASJC Classification
- ;
- DOI
- DOI:10.1016/0378-4371(77)90075-9 Opening in a new tab
- Language
- (en) English
- Score (nominal)
- 0
- Score source
- journalList
- Publication indicators
- = 11; = 9; : 2014 = 1.253; : 2006 (2 years) = 1.311 - 2007 (5 years) =1.469
- Uniform Resource Identifier
- https://researchportal.amu.edu.pl/info/article/UAMb587243d57b84dcda80ba887ebe18924/
- URN
urn:amu-prod:UAMb587243d57b84dcda80ba887ebe18924
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or PerishOpening in a new tab system.