Phase competition in frustrated anisotropic antiferromagnet in strong magnetic field
| Autor: | A. V. Syromyatnikov, O. I. Utesov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Physics Phase transition Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Analytical expressions FOS: Physical sciences 02 engineering and technology Conical surface 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Magnetic field Dipole Condensed Matter - Strongly Correlated Electrons 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 0210 nano-technology Anisotropy Saturation (magnetic) |
| Popis: | We discuss theoretically a frustrated Heisenberg antiferromagnet in magnetic field close to the saturation one. It is demonstrated that a small biaxial anisotropy and/or the magnetic dipolar interaction produce a delicate balance between phases with a commensurate canted, incommensurate helical (conical), and fan spin orderings. As a result, different sequences of phase transitions are realized depending on values of these small anisotropic interactions. We derive analytical expressions for critical fields and ground-state energies of the phases which are in a quantitative agreement with our and previous Monte-Carlo simulations. 10 pages, 2 figures |
| Databáze: | OpenAIRE |
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