Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films

J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (5): 398-402.

• Thin Film and Coatings • Previous Articles Next Articles

Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films

Bo Yang¹⁾, Gaowu Qin¹⁾, Wenli Pei¹⁾, Song Li¹⁾, Yuping Ren¹⁾, Shunji Ishio²⁾

1) Key Laboratory for Anisotropy & Texture of Materials, Northeastern University, Shenyang 110004, China
2) Department of Material Science & Engineering, Akita University, Akita 0108502, Japan

Received:2010-09-19 Revised:2010-10-26 Online:2011-05-28 Published:2011-05-28
Contact: Gaowu Qin
Supported by:
the Program for New Century Excellent Talents in University (No. NCET-09-0272) and the Liaoning Program for Excellent Talents in University (No. 2009R23). One of authors, B. Yang appreciates Northeastern University Research Foundation for Excellent Doctor Candidates (No. 200904)

Abstract

Abstract: In this paper, ternary Co-Pt-P thin films were prepared by magnetron sputtering with platinum and home-made Co-P chips pasted on the cobalt target. The structure and magnetic properties were investigated by X-ray difraction (XRD) and vibrating sample magnetometer (VSM), respectively. With increasing phosphor content, the coercivities of Co-12 at.% Pt-P films increase from 1034 to 1525 Oe owing to the exchange decoupling among magnetic grains. The decrease of inter-granular exchange coupling was confirmed by delta-M curve measurement and magnetic force microscopy (MFM). Transmission electronic microscopy (TEM) with nano-beam composition analysis shows that phosphor segregated at cobalt-based grain boundaries is responsible for
the exchange decoupling. It is thus suggested that the phosphor addition is effective to tune the exchange coupling of magnetic grains, particularly for perpendicular recording media.

Key words: Intergranular exchange coupling, Co-Pt-P, Delta-M, Magnetic recording media

Bo Yang, Gaowu Qin, Wenli Pei, Song Li, Yuping Ren, Shunji Ishio. Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films[J]. J Mater Sci Technol, 2011, 27(5): 398-402.

References

[1 ] N. Honda, K. Ouchi and S.I. Iwasaki: IEEE. Trans. Magn., 2002, 38(4), 1615.

[2 ] J.J. Miles: IEEE. Trans. Magn., 2007, 43(3), 955.

[3 ] G.W. Qin, Y.P. Ren, N. Xiao, B. Yang, L. Zuo and K. Oikawa: Int. Mater. Rev., 2009, 54(3), 157.

[4 ] H.J. Richter: J. Magn. Magn. Mater., 2009, 321(6), 467.

[5 ] J. Yasumori, K. Miura, H. Muraoka, Y. Sonobe and K. Wago: J. Magn. Magn. Mater., 2008, 320(22), 3079.

[6 ] Z. Hong, H.N. Bertram and M.E. Schabes: IEEE. Trans. Magn., 2002, 38(2), 1422.

[7 ] K.K.M. Pandey, J.S. Chen and G.M. Chow: J. Appl. Phys., 2006, 100(5), 054909.

[8 ] T. Shimatsu, Y. Okazaki, H. Sato, O. Kitakami, S. Okamoto, H. Aoi, H. Muraoka and Y. Nakamura: IEEE. Trans. Magn., 2007, 43(6), 2995.

[9 ] H. Sato, T. Shimatsu, Y. Okazaki, O. Kitakami, S. Okamoto, H. Aoi, H. Muraoka and Y. Nakamura: in 10th Joint Magn. Magn. Mater. Conf./Inter. Magn. Conf., Balitmore, MD, 2007, 2106.

[10] O. Chubykalo, B. Lengsfield, J. Kaufman and B. Jones: J. Appl. Phys., 2002, 91(5), 3129.

[11] S.J. Greaves, A.M. Goodman, H. Muraoka and Y. Nakamura: J. Magn. Magn. Mater., 2005, 287, 66.

[12] Y. Nakatani, N. Hayashi, Y. Uesaka and H. Fukushima: J. Appl. Phys., 1999, 85(8), 4726.

[13] L. Zhang, H.S. Lee, J.G. Peng, Z.Y. Zhong and X.T. Zu: J. Phys. D-Appl. Phys., 2008, 41(19), 1950009.

[14] Y.F. Xu, J.P. Wang, Z.S. Shan, H. Jiang, Y. Su, C.T. Chong and L. Lu: J. Magn. Magn. Mater., 2001, 225(3), 359.

[15] W. Zheng, A.L. Wang, H.W. Jiang, Y.S. Zhou and T. Li: Acta Phys. Sin., 2004, 53(8), 2761. (in Chinese)

[16] M. Cortes, S. Matencio, E. Gomez and E. Valles: J. Electroanal. Chem., 2009, 627(1-2), 69.

[17] S. Kulkarni and S. Roy: J. Appl. Phys., 2007, 101(9), 09K524.

[18] K.H. Lee, G.H. Kim and W.Y. Jeung: Electrochem. Commun., 2004, 6(2), 115.

[19] H.D. Park, K.H. Lee, G.H. Kim and W.Y. Jeung: J. Appl. Phys., 2006, 99(8), 08N305.

[20] T.P. Nolan, J.D. Risner, S.D. Harkness, E. Girt, S.Z. Wu, G.P. Ju and R. Sinclair: IEEE. Trans. Magn., 2007, 43(2), 639.

[21] K.H. Lee, S.W. Kang, G.H. Kim and W.Y. Jeung: J. Magn. Magn. Mater., 2004, 272, E925.

[22] B. Yang, G.W. Qin, W.L. Pei, Y.P. Ren and N. Xiao: J. Magn. Magn. Mater., 2010, 322, 1854.

[23] X.Z. Cheng and M.B.A. Jalil: IEEE. Trans. Magn., 2005, 41(10), 3115.

[24] H. Zhou, H.N. Bertram and M.E. Schabes: IEEE. Trans. Magn., 2002, 38(2), 1422.

[25] H. Zhou and H.N. Bertram: IEEE. Trans. Magn., 2002, 38(2), 1405.

[26] P.I. Mayo, K. O0grady, P.E. Kelly, J. Cambridge, I.L. Sanders, T. Yogi and R.W. Chantrell: J. Appl. Phys., 1991, 69(8), 4733.

[27] S.C. Chen, P.C. Kuo, A.C. Sun, C.T. Lie and C.C. Chiang: IEEE. Trans. Magn., 2003, 39(1), 584.

[28] S.C. Chen and T.H. Sun: Vacuum, 2010, 84(12), 1430.

Effect of Phosphor Addition on Intergranular Exchange Coupling of Co-Pt Thin Films

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