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Mapping spin-wave dispersions in stripe-ordered La2-xSrxNiO4 (x=0.275, 0.333)

Abstract:

Using the MAPS spectrometer at the ISIS spallation source, we have measured the magnetic excitations of single-crystal samples of stripe-ordered La2-x Srx Ni O4 with x=0.333 and 0.275. The full two-dimensional spin-wave dispersions were obtained using incident energies of 60 and 160 meV. To analyze the excitations, we have evaluated a spin-only Hamiltonian describing diagonal, site-centered stripes in the linear spin-wave approximation. Besides the superexchange energy J within antiferromagne...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.72.064437

Authors


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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Nakajima, K More by this author
Perring, TG More by this author
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Journal:
PHYSICAL REVIEW B
Volume:
72
Issue:
6
Publication date:
2005-08-05
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:ceb817d9-9b92-4489-9521-fab876781458
Source identifiers:
29920
Local pid:
pubs:29920
Language:
English

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