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Optical absorption zeeman spectroscopy of rare earth orthochromites |
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| Authors: | R. Courths S. Hüfner |
| Affiliation: | (1) Fachbereich Physik Institut für Atom- und Festkörperphysik, Freie Universität Berlin, Boltzmannstraße 20, D-1000 Berlin 33, Germany;(2) Present address: Centre National De la Recherche Scientifique, Groupe Des Transitions De Phases, Centre De Tri, B.P. 166, 38042 Grenoble Cedex, France;(3) Present address: Physikalisches Institut, Universität des Saarlandes, 6600 Saarbrücken, Germany |
| Abstract: | The optical absorption spectrum of Ho in HoCrO3 in the phase  2 (Cr:GzFx; Ho:fxcy) and4 (Cr:GxFz; Ho:fycx) and the magnetization and the susceptibility of HoCrO3 have been studied as a function of temperature and applied magnetic field. The experimental data for the Ho ground state splitting are analyzed using a molecular field approach. The analysis shows that the Cr — Ho interaction is predominantly antisymmetric exchange. The Ho — Ho interaction is of exchange as well as of dipolar origin. The phase diagram for the configurations2 and4 in theH — T plane for fieldsH  y is determined in the temperature region 1.8 K T15 K. |
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