Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer
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| Creator |
Bono, D.
Limot, L. Mendels, P. Collin, G. Blanchard, N. |
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| Subject |
К семидесятилетию антиферромагнетизма
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| Description |
The SrCr₉p Ga₁₂-₉pO₁₉ and Ba₂Sn₂ ZnGa₁₀-₇p Cr₇pO₂₂ compounds are two highly-frustrated magnets possessing a quasi-two-dimensional Kagomé bilayer of spin 3/2 chromium ions with antiferromagnetic interactions. Their magnetic susceptibility was measured by local nuclear magnetic resonance and nonlocal (SQUID) techniques, and their low-temperature spin dynamics by muon spin resonance. Consistent with the theoretical picture drawn for geometrically frustrated systems, the Kagomé bilayer is shown here to exhibit: (i) short range spin-spin correlations down to a temperature much lower than the Curie—Weiss temperature, no conventional long-range transition occurring; (ii) a Curie contribution to the susceptibility from paramagnetic defects generated by spin vacancies; (iii) low-temperature spin fluctuations, at least down to 30 mK, which are a trademark of a dynamical ground state. These properties point to a spin-liquid ground state, possibly built on resonating valence bonds with unconfined spinons as the magnetic excitations.
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| Date |
2017-06-15T13:10:12Z
2017-06-15T13:10:12Z 2005 |
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| Type |
Article
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| Identifier |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer / D. Bono, L. Limot, P. Mendels, G. Collin, N. Blanchard // Физика низких температур. — 2005. — Т. 31, № 8-9. — С. 929-951. — Бібліогр.: 92 назв. — англ.
0132-6414 PACS: 75.40.Gb, 75.50.Lk, 76.75.+i, 76.60.–k http://dspace.nbuv.gov.ua/handle/123456789/121689 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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