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Spin Dynamics of Half-Doped La3/2Sr1/2NiO4

Abstract:

We report polarized- and unpolarized- neutron inelastic scattering measurements of the magnetic excitation spectrum in the spin-charge ordered phase of La3/2Sr1/2NiO4. Up to energies of ~30 meV we observe broad magnetic modes characteristic of a near checkerboard ordering. A linear spin-wave model for an ideal checkerboard ordering with a single antiferromagnetic exchange interaction J' = 5.8 +/- 0.5 meV between next-nearest-neighbour spins on Ni2+ sites, together with a small XY-like single-...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.71.174412

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
Journal:
Phys. Rev. B More from this journal
Volume:
71
Issue:
17
Pages:
174412
Publication date:
2004-10-25
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
Language:
English
Keywords:
Pubs id:
pubs:3438
UUID:
uuid:0d0ab29d-9c73-4f5b-a6da-243e47797b00
Local pid:
pubs:3438
Source identifiers:
3438
Deposit date:
2012-12-19

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