Irreversibility of Adiabatic Demagnetization in the Rotating Frame in Double and Single Quantum NMR in Solids
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概要
- 論文の詳細を見る
We have clarified the origin of the irreversibility involved in adiabatic demagnetization in the rotating frame (ADRF). The irreversibility is very high (≃50%) in single and double quantum ADRF for ^<27>Al nuclei in A1_2O_3, whereas it is very low (≃15%) in single quantum ADRF for ^<19>F in CaF_2, ^7Li and ^<19>F in LiF. Using an analysis based on the Provotorov's theory we conclude that the irreversibility is due to the thermal mixing between Zeeman and dipole systems in the demagnetization process. The conclusion is also supported by the experimental result that the reversibility becomes higher (or lower) when the dipole system is prepared at a positive (or negative) low temperature before ADRF. It is also shown that the characteristics of ADRF can be specified by a parameter T_2D, where T_2 is the free decay time and D the local field in frequency units.
- 社団法人日本物理学会の論文
- 1995-04-15
著者
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HATANAKA Hiroshi
Department of Neuroscience, Osaka Bioscience institute
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Hatanaka H
Division Of Protein Biosynthesis Institute For Protein Research Osaka University
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Hatanaka H
Kobayasi Inst. Physical Res. Kokubunji Jpn
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Hatanaka Hiroshi
Exploratory Research Laboratories Fujisawa Pharmaceutical Co. Ltd.
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HASHI Tsuneo
Department of Physics, Faculty of science and Yoshida College, Kyoto University
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Hashi T
Department Of Physics Kyoto University
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Hashi Tsuneo
Department Of Physics Faculity Of Science Kyoto University
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Hatanaka Hiroshi
Department Of Microbiology Showa College Of Pharmacy
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