Effect of Pressure on Magnetic States of Easy-Plane Antiferromagnets |
| Yu.N. Mitsay, Yu.A. Fridman, G.A. Bairamalieva, C.N. Alexeev M.V. Frunze Simferopol State University, Yaltinskaya st., 4, Simferopol, Ukraine and M.S. Kochmański Institute of Physics, Pedagogical University, Rejtana 16 A, 35-310 Rzeszów, Poland |
| Received: January 8, 1997; in final form: March 3, 1997 |
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| The phase H-P-β diagram of an easy-plane strongly anisotropic antiferromagnet is studied. It is shown that in such a system a realization of the phase with the nonmagnetic order parameter, the so-called quadruple phase, is possible. The realization of this phase is caused by several purely quantum effects, moreover the mechanism of its appearance differs in principle from that of the antiferromagnet or ferromagnet. The possibility of the disappearance of the angular phase (the so-called quadruple ferromagnetic phase) is also shown. |
| DOI: 10.12693/APhysPolA.91.1111 PACS numbers: 75.50.Ee, 75.30.Kz |