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碩士 === 國立中正大學 === 物理學系 === 85 === ABSTRACT We report the time-dependent diamagnetic magnetization for a polycrystalline LuNi2B2C superconductor measured in magnetic fields 5 kOe, 6 kOe and 7 kOe between 2 K and 13 K with a Quantum design SQ...
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1997
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| Online Access: | http://ndltd.ncl.edu.tw/handle/54850190814762615719 |
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ndltd-TW-085CCU001980012015-10-13T12:14:44Z http://ndltd.ncl.edu.tw/handle/54850190814762615719 . LuNi2B2C超導體之磁通鬆弛物理性質研究 Liu, P. Y. 劉寶玉 碩士 國立中正大學 物理學系 85 ABSTRACT We report the time-dependent diamagnetic magnetization for a polycrystalline LuNi2B2C superconductor measured in magnetic fields 5 kOe, 6 kOe and 7 kOe between 2 K and 13 K with a Quantum design SQUID magnetometer . The thermally activation flux-creep model derived by Beasley et al, was employed to analyze our experimental data. Arrehnius plots of E / kT＝｜M0｜ / (dM / dlnt) vs 1 / T showed that the apparent activation energy for LuNi2B2C is strongly dependent on the temperature and applied magnetic field. From our experimental data, the range of the apparent activation energy for this material is between 0.7 eV(H＝5 kOe, T ＝7 K∼13 k) and 0.03 eV (H＝7 kOe, T ＝2 K∼4.5 k) . W. H. Lee 李文新 1997 學位論文 ; thesis 58 zh-TW |
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NDLTD |
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碩士 === 國立中正大學 === 物理學系 === 85 === ABSTRACT We report the time-dependent diamagnetic magnetization
for a polycrystalline LuNi2B2C superconductor measured in
magnetic fields 5 kOe, 6 kOe and 7 kOe between 2 K and 13 K with
a Quantum design SQUID magnetometer . The thermally activation
flux-creep model derived by Beasley et al, was employed to
analyze our experimental data. Arrehnius plots of E / kT＝｜M0｜
/ (dM / dlnt) vs 1 / T showed that the apparent activation
energy for LuNi2B2C is strongly dependent on the temperature and
applied magnetic field. From our experimental data, the range of
the apparent activation energy for this material is between 0.7
eV(H＝5 kOe, T ＝7 K∼13 k) and 0.03 eV (H＝7 kOe, T ＝2 K∼4.5
k) .
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| author2 |
W. H. Lee |
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W. H. Lee Liu, P. Y. 劉寶玉 |
| author |
Liu, P. Y. 劉寶玉 |
| spellingShingle |
Liu, P. Y. 劉寶玉 . |
| author_sort |
Liu, P. Y. |
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. |
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. |
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. |
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. |
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. |
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. |
| publishDate |
1997 |
| url |
http://ndltd.ncl.edu.tw/handle/54850190814762615719 |
| work_keys_str_mv |
AT liupy luni2b2cchāodǎotǐzhīcítōngsōngchíwùlǐxìngzhìyánjiū AT liúbǎoyù luni2b2cchāodǎotǐzhīcítōngsōngchíwùlǐxìngzhìyánjiū |
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1716855112034418688 |