Abstract
We have established for TmGa 3 the occurrence of two close lying first-order transitions. The first transition at T Q = 4.29 K drives the compound to a distorted phase and the second one at T N = 4.26 K to an antiferromagnetic state. They are pushed apart markedly by an applied magnetic field. In the whole temperature range of the ordering we have observed a first-order field-induced metamagnetic transition along the 〈100〉 direction. The temperature variation of the reciprocal susceptibility gives magnetic Γ (5) 5 as the ground state. It is well known that the Γ 5 ground state of a Tm 3+ ion leads to a strong first-order structural transition in TmCd and TmZn intermetallics. Therefore we may assume that the structural transition in TmGa 3 has the same origin as in the compounds mentioned above. This transition is driven by quadrupolar pair interactions. The lattice follows the quadrupoles and distorts in such a way as to minimize the Jahn-Teller coupling energy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Physica B+C
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
