Giant Magnetoresistance in La0.67 Ca0.33 MnO3 /Alq3 /Co Sandwiched-Structure Organic Spin Valves
PANG Zhi-Yong, CHEN Yan-Xue, LIU Tian-Tian, ZHANG Yun-Pang, XIE Shi-Jie, YAN Shi-Shen, HAN Sheng-Hao
School of Physics and Microelectronics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100
Giant Magnetoresistance in La0.67 Ca0.33 MnO3 /Alq3 /Co Sandwiched-Structure Organic Spin Valves
PANG Zhi-Yong;CHEN Yan-Xue;LIU Tian-Tian;ZHANG Yun-Pang;XIE Shi-Jie;YAN Shi-Shen;HAN Sheng-Hao
School of Physics and Microelectronics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100
关键词 ：
72.25.Dc ,
72.25.Hg ,
75.47.De
Abstract ： La0.67 Ca0.33 MnO3 /Alq3 /Co sandwiched-structure organic spin valves are fabricated by vacuum thermal evaporation method. A giant magnetoresistance (GMR) of 14% is observed at low temperature 100K. At 30K, the magnetoresistance can increase to 50%. The large GMR of the device is attributed to the high spin polarization and low conductivity of the La0.67 Ca0.33 MnO3 contact. The magnetoresistance ΔR/R and the coercive field of the Co electrode depend strongly on temperature. The large high-field magnetoresistance reported on La0.67 Sr0.33 MnO3 /Alq3 /Co organic spin valves [Nature 427 (2004) 821] is not observed in our La0.67 Ca0.33 MnO3 /Alq2 /Co organic spin valves.
Key words ：
72.25.Dc
72.25.Hg
75.47.De
出版日期: 2006-06-01
:
72.25.Dc
(Spin polarized transport in semiconductors)
72.25.Hg
(Electrical injection of spin polarized carriers)
75.47.De
(Giant magnetoresistance)
引用本文:
PANG Zhi-Yong;CHEN Yan-Xue;LIU Tian-Tian;ZHANG Yun-Pang;XIE Shi-Jie;YAN Shi-Shen;HAN Sheng-Hao. Giant Magnetoresistance in La0.67 Ca0.33 MnO3 /Alq3 /Co Sandwiched-Structure Organic Spin Valves[J]. 中国物理快报, 2006, 23(6): 1566-1569.
0.67 Ca0.33 MnO3 /Alq3 /Co Sandwiched-Structure Organic Spin Valves. Chin. Phys. Lett., 2006, 23(6): 1566-1569.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2006/V23/I6/1566
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2006, Vol. 23 
