| Issue |
Europhys. Lett.
Volume 55, Number 5, September 2001
|
|
|---|---|---|
| Page(s) | 732 - 738 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00475-5 | |
| Published online | 01 December 2003 | |
Off-diagonal exchange-induced transverse and
field-induced spin-flop order in the diluted metamagnet
1
Laboratorium für Angewandte Physik,
Gerhard-Mercator-Universität
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
Received:
9
February
2001
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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