Conference paper · Journal article
Magnetic and quadrupolar ordering in TmNi2B2C
We present neutron and high-energy synchrotron X-ray diffraction studies to show that the anomalous antiferromagnetic (AF) phase diagram of TmNi2B2C in an applied field along [1 0 0] is governed by a quadrupolar ordering of the Tm ions. The ordering is revealed by a distortion of the lattice with the Tm ions displaced along the c-axis and modulated with the same wave vector QA=(0.484, 0, 0) as the AF phase induced by fields larger than ≈10 kOe.
In zero field, the quadrupolar ordering temperature is TQ≅13.5 K but increases to about 20 K in a field of 100 kOe. The Tm displacements are also significantly enhanced, by a factor of 10 at 60 kOe. A model is presented that accounts for the quadrupolar as well as the low-field QF=(0.94, 0.94, 0) and high-field QA=(0.483, 0, 0) AF ordering previously observed in this compound.
Language: | English |
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Year: | 2006 |
Pages: | 63-65 |
Proceedings: | 8th International Conference on Neutron Scattering |
ISSN: | 18732135 and 09214526 |
Types: | Conference paper and Journal article |
DOI: | 10.1016/j.physb.2006.05.103 |
ORCIDs: | Abrahamsen, A.B. , 0000-0002-7954-8073 and 0000-0002-6328-7462 |