Neutron study of the magnetism in NiCl2·4SC(NH2)2.
- Tsyrulin N Laboratory for Neutron Scattering, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
- Batista CD
- Zapf VS
- Jaime M
- Hansen BR
- Niedermayer C
- Rule KC
- Habicht K
- Prokes K
- Kiefer K
- Ressouche E
- Paduan-Filho A
- Kenzelmann M
- 2013-05-08
Published in:
- Journal of physics. Condensed matter : an Institute of Physics journal. - 2013
English
We study the strongly anisotropic quasi-one-dimensional S = 1 quantum magnet NiCl2·4SC(NH2)2 using elastic and inelastic neutron scattering. We demonstrate that a magnetic field splits the excited doublet state and drives the lower doublet state to zero energy at a critical field Hc1. For Hc1 < H < Hc2, where Hc2 indicates the transition to a fully magnetized state, three-dimensional magnetic order is established with the AF moment perpendicular to the magnetic field. We mapped the temperature/magnetic field phase diagram, and we find that the total ordered magnetic moment reaches m(tot) = 2.1 μB at the field μ(0)H = 6 T and is thus close to the saturation value of the fully ordered moment. We study the magnetic spin dynamics in the fully magnetized state for H > Hc2, and we demonstrate the presence of an AF interaction between Ni(2+) on the two interpenetrating sublattices. In the antiferromagnetically ordered phase, the spin-waves that develop from the lower-energy doublet are split into two modes. This is most likely the result of the presence of the AF interaction between the interpenetrating lattices.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1088/0953-8984/25/21/216008
- PMID 23649209
- Persistent URL
- https://sonar.ch/global/documents/751
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