| Enhancing low-field magnetoresistance of La0.67Ca0.33MnO3 films deposited on anodized aluminium-oxide membranes |
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| 作者姓名： | 唐为华 李培刚 雷鸣 郭艳峰 陈雷明 李玲红 宋朋云 陈晋平 |
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| 作者单位： | Department of Physics, Center for Optoelectronics materials and Devices, Zhejiang Sci-Tech University, Xiasha College Park, Hangzhou 310018,China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences,Be;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences,Beijing 100080, China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences,Beijing 100080, China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences,Beijing 100080, China;Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences,Beijing 100080, China;Department of Physics, University of Dayton, Dayton, OH 45469, USA;Department of Physics, Peking University, Beijing 100871, China;Department of Physics, Peking University, Beijing 100871, China |
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| 基金项目： | Project supported by the key program of Natural Science Foundation of Zhejiang Provincial, China (Grant No National Natural Science Foundation of China (Grant No 60571029), the `Hundred Talents Project' of Chinese Academy of Sciences, China, the Creative Research Group of the National Natural Science Foundation of China (Grant No 60321001). |
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| 摘 要： | In this paper we report a new method to fabricate nanostructured films, La0.67Ca0.33MnO3 （LCMO） nanostructured films have been fabricated by using pulsed electron beam deposition （PED） on anodized aluminium oxide （AAO） membranes, The magnetic and electronic transport properties are investigated by using the Quantum Design physics properties measurement system （PPMS） and magnetic properties measurement system （MPMS）. The resistance peak temperature （Tp） is about 85 K and the Curie temperature （To） is about 250 K for the LCMO film on an AAO membrane with a pore diameter of 20nm. Large magnetoresistance ratio （MR） is observed near Tp. The MR is as high as 85% under 1 T magnetic field. The great enhancement of MR at low magnetic fields could be attributed to the lattice distortion and the grain boundary that are induced by the nanopores on the AAO membrane.
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| 关 键 词： | 低场磁致电阻 纳米薄膜 传输性 La0.67Ca0.33MnO3薄膜 阳极 |
| 收稿时间： | 2005-09-30 |
| 修稿时间： | 2005-09-302006-02-23 |
Enhancing low-field magnetoresistance of La0.67Ca0.33MnO3 films deposited on anodized aluminium-oxide membranes |
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| Tang Wei-Hu,Li Pei-Gang,Lei Ming,Guo Yan-Feng,Chen Lei-Ming,Li Ling-Hong,Song Peng-Yun and Chen Chinping.Enhancing low-field magnetoresistance of La0.67Ca0.33MnO3 films deposited on anodized aluminium-oxide membranes[J].Chinese Physics B,2006,15(4):767-772. |
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| Authors: | Tang Wei-Hu Li Pei-Gang Lei Ming Guo Yan-Feng Chen Lei-Ming Li Ling-Hong Song Peng-Yun and Chen Chinping |
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| Abstract: | In this paper we report a new method to fabricate nanostructured films.
La0.67Ca0.33MnO3 (LCMO) nanostructured films have been
fabricated by using pulsed electron beam deposition (PED) on anodized
aluminium oxide (AAO) membranes. The magnetic and electronic transport
properties are investigated by using the Quantum Design physics properties
measurement system (PPMS) and magnetic properties measurement system
(MPMS). The resistance peak temperature (Tp) is about 85\,K and the Curie
temperature (Tc is about 250\,K for the LCMO film on an AAO membrane
with a pore diameter of 20\,nm. Large magnetoresistance ratio (MR) is
observed near Tp. The MR is as high as 85% under 1\,T magnetic field.
The great enhancement of MR at low magnetic fields could be attributed to
the lattice distortion and the grain boundary that are induced by the
nanopores on the AAO membrane. |
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| Keywords: | colossal magnetoresistance nanostructured film transport properties |
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