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Competing exchange interactions in Li2CuO2
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UNSPECIFIED (1998) Competing exchange interactions in Li2CuO2. EUROPHYSICS LETTERS, 43 (1). pp. 77-82. ISSN 0295-5075.
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Abstract
The dispersion of the spin-waves in single crystals of Li2CuO2 has been investigated by means of inelastic neutron scattering. The results yield a single spin-wave branch characterized by a large gap Delta = 1.4 meV at the zone centre due to easy,axis uniaxial anisotropy. Linear spin-wave theory is used to obtain the exchange integrals in this material. It turns out that the nearest-neighbor exchange interactions in the basal plane are antiferromagnetic leading to frustration between the magnetic moments. Our results show that Li2CuO2 is an S = 1/2 antiferromagnetic insulator with competing interactions.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | EUROPHYSICS LETTERS | ||||
Publisher: | E D P SCIENCES | ||||
ISSN: | 0295-5075 | ||||
Official Date: | 1 July 1998 | ||||
Dates: |
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Volume: | 43 | ||||
Number: | 1 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 77-82 | ||||
Publication Status: | Published |
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