Volume 55, Number 5, September 2001
|Page(s)||732 - 738|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
Off-diagonal exchange-induced transverse and field-induced spin-flop order in the diluted metamagnet
Laboratorium für Angewandte Physik,
D-47048 Duisburg, Germany
2 RIKEN (The Institute of Physical and Chemical Research) Wako, Saitama 351-0198, Japan
3 Department of Education, Chiba University - Chiba 351-0198, Japan
Accepted: 21 June 2001
Specific heat and Faraday rotation magnetometry were used to determine the axial magnetic phase diagram of the dilute hexagonal antiferromagnet . In contrast to metamagnetic pure , the first-order line of transverse phase transitions, , is disconnected with the antiferro-to-paramagnetic phase line and extends down to at . This is attributed to symmetric off-diagonal exchange in the presence of structural disorder. Moreover, a spin-flop phase emerges beyond up to a bicritical point ( , ).
PACS: 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.) / 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
© EDP Sciences, 2001
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