Quantum phase transition: Van Vleck antiferromagnet in a magnetic field
Theoretical description of magnetic properties of antiferromagnetic state, induced by the longitudinal magnetic field, in the Van Vleck - singlet - magnet with single-ion anisotropy of "easy-plane" type and ion spin S=1 is proposed. It is shown that the quantum phase transition to the anti...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Institute for Condensed Matter Physics
2008-09-01
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| Series: | Condensed Matter Physics |
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| Online Access: | http://dx.doi.org/10.5488/CMP.11.3.509 |
| _version_ | 1811232013050445824 |
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| author | I.M.Ivanova V.M.Kalita V.O.Pashkov V.M.Loktev |
| author_facet | I.M.Ivanova V.M.Kalita V.O.Pashkov V.M.Loktev |
| author_sort | I.M.Ivanova |
| collection | DOAJ |
| description | Theoretical description of magnetic properties of antiferromagnetic state, induced by the longitudinal magnetic field, in the Van Vleck - singlet - magnet with single-ion anisotropy of "easy-plane" type and ion spin S=1 is proposed. It is shown that the quantum phase transition to the antiferromagnetic state is connected with the spontaneous appearance of spin polarization in the easy plane. Spin polarization of the ground non-degenerated state proves to be the order parameter of such a transition and the Landau thermodynamic approach can be employed for its (transition) description. The magnetic properties which include the field behavior of magnetization and magnetic susceptibility of the antiferromagnetic phase in the fields of different directions are studied. An attempt is made to qualitatively compare the obtained results with the available experimental data. |
| first_indexed | 2024-04-12T10:54:49Z |
| format | Article |
| id | doaj.art-f29a378e0d2a4d2aa3f0aa8aea157edc |
| institution | Directory Open Access Journal |
| issn | 1607-324X |
| language | English |
| last_indexed | 2024-04-12T10:54:49Z |
| publishDate | 2008-09-01 |
| publisher | Institute for Condensed Matter Physics |
| record_format | Article |
| series | Condensed Matter Physics |
| spelling | doaj.art-f29a378e0d2a4d2aa3f0aa8aea157edc2022-12-22T03:36:07ZengInstitute for Condensed Matter PhysicsCondensed Matter Physics1607-324X2008-09-01113509Quantum phase transition: Van Vleck antiferromagnet in a magnetic fieldI.M.IvanovaV.M.KalitaV.O.PashkovV.M.LoktevTheoretical description of magnetic properties of antiferromagnetic state, induced by the longitudinal magnetic field, in the Van Vleck - singlet - magnet with single-ion anisotropy of "easy-plane" type and ion spin S=1 is proposed. It is shown that the quantum phase transition to the antiferromagnetic state is connected with the spontaneous appearance of spin polarization in the easy plane. Spin polarization of the ground non-degenerated state proves to be the order parameter of such a transition and the Landau thermodynamic approach can be employed for its (transition) description. The magnetic properties which include the field behavior of magnetization and magnetic susceptibility of the antiferromagnetic phase in the fields of different directions are studied. An attempt is made to qualitatively compare the obtained results with the available experimental data.http://dx.doi.org/10.5488/CMP.11.3.509quantum magnetic phase transitionsingle-ion anisotropyspin polarizationVan-Vleck antiferromagnet |
| spellingShingle | I.M.Ivanova V.M.Kalita V.O.Pashkov V.M.Loktev Quantum phase transition: Van Vleck antiferromagnet in a magnetic field Condensed Matter Physics quantum magnetic phase transition single-ion anisotropy spin polarization Van-Vleck antiferromagnet |
| title | Quantum phase transition: Van Vleck antiferromagnet in a magnetic field |
| title_full | Quantum phase transition: Van Vleck antiferromagnet in a magnetic field |
| title_fullStr | Quantum phase transition: Van Vleck antiferromagnet in a magnetic field |
| title_full_unstemmed | Quantum phase transition: Van Vleck antiferromagnet in a magnetic field |
| title_short | Quantum phase transition: Van Vleck antiferromagnet in a magnetic field |
| title_sort | quantum phase transition van vleck antiferromagnet in a magnetic field |
| topic | quantum magnetic phase transition single-ion anisotropy spin polarization Van-Vleck antiferromagnet |
| url | http://dx.doi.org/10.5488/CMP.11.3.509 |
| work_keys_str_mv | AT imivanova quantumphasetransitionvanvleckantiferromagnetinamagneticfield AT vmkalita quantumphasetransitionvanvleckantiferromagnetinamagneticfield AT vopashkov quantumphasetransitionvanvleckantiferromagnetinamagneticfield AT vmloktev quantumphasetransitionvanvleckantiferromagnetinamagneticfield |