[1] Baibich M N, Broto J M, Fert A, Nguyen F Dau Van, Petroff F,
Etienne P, Creuzet G, Friederich A and Chazelas J 1988 Phys. Rev.
Lett. 61 2472

[2] Bamas J, Fuss A, Camley R, Crunberg P and Zinn W 1990
Phys. Rev. B 42 8110

[3] Wolf S A, Awschalom D and Buhrman R A 2001 Science 294 1488

[4] Meservey R 1970 Phys. Rev. Lett. 25 1270

[5] Johnson M and Silsbee R H 1985 Phys. Rev. Lett. 55 1790

[6] Monzon F G, Tang H X and Roukes M L 2000 Phys. Rev. Lett.
84 5022

[7] Ohno Y, Young D K, Beschoten B, Matsukura F, Ohno H and Awschalom D
D 1999 Nature 402 790

[8] Ruden P P and Smith D L 2004 J. Appl. Phys. 95 4898

[9] Dediu V, Murgia M, Matacotta F C, Taliani C and Barbanera S 2002
Solid Stat. Commun. 122 181

[10] Xiong Z H, Wu D, Vardeny Z Valy and Shi J 2004 Nature 427 821

[11] Xie S J, Ahn K H, Smith D L, Bishop A R and Saxena A 2003
Phys. Rev. B 67 125202

[12] Ren J F, Fu J Y, Liu D S, Mei L M and Xie S J 2005 J.
Appl. Phys. 98 074503

[13] Yu Z G 2002 Phys. Rev. B 66 201202(R)

[14] Yu Z G 2002 Phys. Rev. B 66 235302

[15] Heeger A J r, Kivelson S, Schrieffer J R and Su W P 1988
Rev. Mod. Phys. 60 781

[16] Davids P S, Saxena A and Smith D L 1995 J. Appl. Phys.
78 4244

[17] Walker A B, Kambili A and Martin S J 2002 J. Phys:
Condens. Matter 14 9825

[18] Fu L R, Ye H J and Li L 1998 Acta Phys. Sin. 47
94 (in Chinese)

[19] Wang L X, Liu D S and Xie S J 2002 Acta Phys. Sin.
51 362 (in Chinese)

[20] Wang L X, Zhang D C, Lui D S, Han S H and Xie S J 2003
Acta Phys. Sin. 52 2548 (in Chinese)

[21] Ren J F 2004 Acta Phys. Sin. 53 188 (in Chinese)

[22] Ren J F,Fu J Y, Liu D S, Mei L M and Xie S J 2005 J.
Phys.: Condens. Matter 17 2341

[23] Ren J F ,Fu J Y, Liu D S, Mei L M and Xie S J 2005
Synth. Met. 155 611