Point Contact Andreev Reflection Measurement of the Spin Polarization of Ferromagnetic Alloy NiFeSb
LI Zhuang-Zhi1, TAO Hong-Jie1, WEN Hai-Hu1, ZHANG Ming2, LIU Zhu-Hong2, CUI Yu-Ting2, WU Guang-Heng2
1National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
2State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Point Contact Andreev Reflection Measurement of the Spin Polarization of Ferromagnetic Alloy NiFeSb
LI Zhuang-Zhi1;TAO Hong-Jie1;WEN Hai-Hu1;ZHANG Ming2;LIU Zhu-Hong2;CUI Yu-Ting2;WU Guang-Heng2
1National Laboratory for Superconductivity, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080
2State Key Laboratory of Magnetism, Institute of Physics, Chinese Academy of Sciences, Beijing 100080
Abstract： We have studied the temperature-dependent and barrier-strength-dependent Andreev reflection tunneling spectroscopy with point contacts consisted of newly synthesized half-metallic alloy NiFeSb and Nb tip. By fitting the data to the generalized Blonder-Tinkham-Klapwijk theory a spin polarization P = 0.52 was obtained.
LI Zhuang-Zhi;TAO Hong-Jie;WEN Hai-Hu;ZHANG Ming;LIU Zhu-Hong;CUI Yu-Ting;WU Guang-Heng. Point Contact Andreev Reflection Measurement of the Spin Polarization of Ferromagnetic Alloy NiFeSb[J]. 中国物理快报, 2002, 19(8): 1181-1183.
LI Zhuang-Zhi, TAO Hong-Jie, WEN Hai-Hu, ZHANG Ming, LIU Zhu-Hong, CUI Yu-Ting, WU Guang-Heng. Point Contact Andreev Reflection Measurement of the Spin Polarization of Ferromagnetic Alloy NiFeSb. Chin. Phys. Lett., 2002, 19(8): 1181-1183.
2002, Vol. 19 
