Phase Transitions Induced in HoCo3Ni2 Single Crystals |
| J. Zawadzkia, R. Balloub, B. Gorgesb and R. Szymczaka aInstitute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland bLLouis Néel Laboratory of Magnetism, C.N.R.S. 166X, 38042 Grenoble Cedex, France |
| Received: September 29, 1992 |
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| The magnetic studies of temperature and field induced phase transitions were performed on single crystals of HoCo3Ni2 compound. The rotational-type spin reorientation was found between TSR1 = 160 K and TSR2 = 200 K. In the vicinity of TSR1 two different field induced transitions were observed: the first order moment reorientation type transition in the basal plane and the spin reorientation from the easy plane to the c-axis with simultaneous increase in spontaneous magnetization. The intersublattice molecular field coefficient as well as the magnetization anisotropy of Ho sublattice were determined. The observed magnetic behaviour was analysed within the framework of the spin-reorientation model, taking into account the change of the intrinsic states of rare-earth ions caused by their huge anisotropy energy. The thermal variation of the anisotropy constants of the studied compound is also presented. |
| DOI: 10.12693/APhysPolA.83.209 PACS numbers: 75.30.Gw, 75.30.Kz, 75.50.Gg, 75.60.Ej |