Magnetic and orbital ordering in the spinel MnV{sub 2}O{sub 4}.
Neutron inelastic scattering and diffraction techniques have been used to study the MnV{sub 2}O{sub 4} spinel system. Our measurements show the existence of two transitions to long-range ordered ferrimagnetic states, the first collinear and the second noncollinear. The lower temperature transition, characterized by development of antiferromagnetic components in the basal plane, is accompanied by a tetragonal distortion and the appearance of a gap in the magnetic excitation spectrum. The low-temperature noncollinear magnetic structure has been definitively resolved. Taken together, the crystal and magnetic structures indicate a staggered ordering of the V d orbitals. The anisotropy gap is a consequence of unquenched V orbital angular momentum.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Institute of Standards and Technology (NIST)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 925378
- Report Number(s):
- ANL/IPNS/JA-60592; PRLTAO; TRN: US0802434
- Journal Information:
- Phys. Rev. Lett., Vol. 1, Issue Feb. 15, 2008; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- ENGLISH
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