Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer
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...
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Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2005
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| Zitieren: | 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. |
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Bono, D. Limot, L. Mendels, P. Collin, G. Blanchard, N. 2017-06-15T13:10:12Z 2017-06-15T13:10:12Z 2005 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 https://nasplib.isofts.kiev.ua/handle/123456789/121689 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. We thank H. Alloul, F. Bert, J. Bobroff, R.J. Cava, D. Huber, A. Keren, C. Lhuillier, M. Mekata, G. Misguich, R. Moessner, C. Mondelli, H. Mutka, B. Ouladdiaf, C. Payen, P. Schiffer and P. Sindzingre for fruitful discussions. We also wish to thank A. Amato, C. Baines and A.D. Hillier, our SR local contacts, whose outstanding efforts have made these experiments possible. The SR experiments were performed at the Swiss Muon Source, Paul Scherer Institute, Villigen, Switzerland, and financially supported by the Federal Office for Education and Science, Berne, Switzerland, as well as at the ISIS facility, Rutherford Appleton Laboratory, Didcot, United Kingdom. Part of this work was financially supported by the EC IHP Programme for large scale facilities and by the EC Framework Programmes V and VI. We are grateful to the muon beamline groups and to the technical staff of Laboratoire de Physique des Solides, Orsay. en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур К семидесятилетию антиферромагнетизма Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer |
| spellingShingle |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer Bono, D. Limot, L. Mendels, P. Collin, G. Blanchard, N. К семидесятилетию антиферромагнетизма |
| title_short |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer |
| title_full |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer |
| title_fullStr |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer |
| title_full_unstemmed |
Correlations, spin dynamics, defects: the highly-frustrated Kagomé bilayer |
| title_sort |
correlations, spin dynamics, defects: the highly-frustrated kagomé bilayer |
| author |
Bono, D. Limot, L. Mendels, P. Collin, G. Blanchard, N. |
| author_facet |
Bono, D. Limot, L. Mendels, P. Collin, G. Blanchard, N. |
| topic |
К семидесятилетию антиферромагнетизма |
| topic_facet |
К семидесятилетию антиферромагнетизма |
| publishDate |
2005 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| 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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| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/121689 |
| citation_txt |
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. |
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2025-11-30T12:48:31Z |
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