Phase diagram of antiferromagnetic cobalt fluoride

The H-T phase diagram of antiferromagnetic cobalt fluoride in an external magnetic field H perpendicular to the easy magnetization axis A is completed and used to construct a phase diagram in the variables Hz and Hy. In this diagram, the lines corresponding to second-order phase transitions (between...

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Bibliographic Details
Published inPhysics of the solid state Vol. 48; no. 7; pp. 1309 - 1314
Main Authors Zavrazhnaya, E. M., Chepurnykh, G. K.
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.07.2006
Subjects
Antiferromagnetism
Basal plane
Cobalt fluorides
Critical angle
Fluorides
Magnetic fields
Magnetism
Phase diagrams
Phase transitions
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Summary:The H-T phase diagram of antiferromagnetic cobalt fluoride in an external magnetic field H perpendicular to the easy magnetization axis A is completed and used to construct a phase diagram in the variables Hz and Hy. In this diagram, the lines corresponding to second-order phase transitions (between an angular phase and a phase with antiferromagnetic vector I ⊥ A) begin and end in fields of a spin-flip transition (i.e., in an exchange field). A peculiarity of these lines of phase transitions is that each of them has two tricritical points at which this line of second-order phase transitions transforms into a line of first-order phase transitions. A critical angle between the direction of the external magnetic field and the basal plane within which the first-order phase transition takes place is determined.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783406070158