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Muon spin relaxation/rotation (µSR) and magnetic susceptibility measurements were carried out on antiferromagnetic nanoparticles of CuO. Nanoparticles with center size of around 5 nm were prepared by ball-milling from single crystals of CuO and investigated using µSR measurements. In the ~5 nm assembly, the TN was reduced drastically to ~30 K, compared with the bulk TN=229 K. A similar effect was observed in a system of 2 to 3 nm diameter nanorods, which was synthesized by a direct solution reaction method, where TN was suppressed further to 13 K. The present work reports direct evidence of a dramatic finite-size effect on the magnetic transition temperature in antiferromagnetic systems.
収録刊行物
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- Physical review. Third series. B, Condensed matter and materials physics
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Physical review. Third series. B, Condensed matter and materials physics 72 (1), 014464-1-014464-8, 2005-07-28
Published by the American Physical Society through the American Institute of Physics
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詳細情報 詳細情報について
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- CRID
- 1050845763839853568
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- NII論文ID
- 120002440800
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- NII書誌ID
- AA11187113
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- ISSN
- 24699969
- 10980121
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- HANDLE
- 10228/622
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
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