Magnetic Behaviour of Sm2Co7/Fe/Sm2 Co7, Nanocomposite Trilayers with Cr and Ti Additions
-
Abstract
Trilayered Sm2Co7/Fe/Sm2Co7 spring exchange magnets are fabricated by dc magnetron sputtering on MgO substrates. Very thin layers (0.3-0.7nm) of Cr and Ti are added at the interfaces of the two magnetic phases. The thickness of Sm2Co7 is kept at 20nm and Fe at 6nm while the thickness of Cr and Ti are
varied as 0.3, 0.5, and 0.7nm. The base pressure of sputtering chamber is kept below 10-7Torr and Ar pressure at 3-8mTorr. The samples are haracterized by x-ray diffraction (XRD) and SQUID magnetometer. We report improvement in exchange coupling of nonacomposite magnets by addition of thin layers of Cr at interfaces.
-
References
[1] Kneller, E F and Hawig R 1991 IEEE Trans. Magn. 27 3588 [2] Jiang J S et al 2005 J. Appl. Phys. 97 10K311 [3] Yu M H et al 2005 J. Appl. Phys. 98 063908 [4] Weston J L, Yan S S, Zangari G and Bernard J A 2001 J. Appl. Phys. 89 6831 [5] Jiang J S and Bader S D 2002 Scripta Mater. 47563 [6] Schrefl T, Forster H, Dittrich R, Suess D, Scholz W, andFidler J 2003 J. Appl. Phys. 93 6489 [7] Y{\ild{\iz F, Yalc{\in O, Ozdemir M, Aktas B,Oseoglu YK and Jiang J S 2004 J. Magn. Magn. Mater. 272--276e1941 [8] Kato H, Ishizone M, Koyama K and Miyazaki T 2005 J.Magn. Magn. Mater. 290/291 1221 [9] Ao Q, Zhang W and Wu J 2006 J. Magn. Magn. Mater. 299 440 [10] Shahzad F, Siddiqi S A and Zhou J 2008 Chin. Phys.Lett. 25 2642 [11] Yao J M, Chin T S and Chen S K 1994 J. Appl. Phys. 76 7071 [12] Liu W, Zhang Z D, Liu J P, Sun X K, Sellmyer D J and ZhaoX G 2000 J. Magn. Magn. Mater. 221 278 [13] Bernardi J, Soto G F, Fidler J, David S and Givord D 1999 J. Appl. Phys. 85 5905 [14] Choi Y et al 2007 Phys. Rev. B 75 104432
[15 ] Liu J P, Liu Y, Skomski R, and Sellmyer D J 1999 IEEE Trans. Magn. 35 3241[15] Al-Omari I A and Sellmyer D J 1995 Phys. Rev. B 52 3441 [16] Zhou J, Skomski R, Liu Y, Sui Y C, Liu W, and Sellmyer DJ 2005 J. Appl. Phys. 97 10K304 -
Related Articles
DownLoad: