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The L10-ordered FePt films are promising materials for ultra high density magnetic recording media due to their high magnetic anisotropies. In this work, the L10-ordered FePt thin films are prepared by magnetron sputtering on CrW underlayer. A three-dimensional micromagnetic model, based on the symmetry of the L10 phase, is set up for FePt perpendicular media. According to the mismatch between the underlayer and FePt magnetic layer, a residual tensile stress is applied in the film plane. The simulated M-H loops accord well with the experimental results. The tetragonal crystalline anisotropy, especially high in-plane anisotropy, could enlarge the in-plane coercivity. The simulated perpendicular and longitudinal loops each have an open up in the tail, which is mainly due to the magnetostriction of the L10 phase.
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Keywords:
- magnetic recording /
- micromagnetics /
- magnetic hysteresis loop /
- magnetostriction
[1] Li L, Jiang L L, Zeng Y, Liu G 2013 Chin. Phys. B 22 127503
[2] Maenosono S, Suzuki T, Saita S 2008 J. Magn. Magn. Mater. 320 L79
[3] Zhang X, Shi L, Li J, Xia Y J, Shi Z, Zhou S M 2013 Chin. Phys. B 22 117803
[4] Mizukami S, Iihama S, Inami N, Hiratsuka T, Kim G, Naganuma H, Oogane M, Ando Y 2011 Appl. Phys. Lett. 98 052501
[5] Feng C, Zhan Q, Li B H, Teng J, Li M H, Jiang Y, Yu G H 2009 Acta Phys. Sin. 58 3503 (in Chinese) [冯春, 詹倩, 李宝河, 滕蛟, 李明华, 姜勇, 于广华 2009 58 3503]
[6] Liu L W, Dang H G, Sheng W, Wang Y, Cao J W, Bai J M, Wei F L 2013 Chin. Phys. B 22 047503
[7] Wang Y, Wang R, Xie H L, Bai J M, Wei F L 2013 Chin. Phys. B 22 068506
[8] Ho P, Evans R F L, Chantrell R W, Han G C, Chow G M, Chen J S 2011 Appl. Phys. Lett. 99 162503
[9] McCallum A T, Krone P, Springer F, Brombacher C, Albrecht M, Dobisz E, Grobis M, Weller D, Hellwig O 2011 Appl. Phys. Lett. 98 242503
[10] Laenens B, Almeida F M, Planckaert N, Temst K, Meersschaut J, Vantomme A, Rentenberger C, Rennhofer M, Sepiol B 2009 J. Appl. Phys. 105 073913
[11] Sun A C, Hsu J H, Huang H L, Kuo P C 2006 J. Appl. Phys. 99 08E709
[12] Sun A C, Yuan F T, Hsu J H 2010 J. Phys.: Conf. Ser. 200 102009
[13] Landau L D, Lifshitz E M 1984 Electrodynamics of Continuous Media (2nd Ed.) (New York: Pergamon Press) p138
[14] Cao J, Cai J, Liu Y, Yang Z, Wei F, Xia A, Han B, Bai J 2006 J. Appl. Phys. 99 08F901
[15] Rasmussen P, Rui X, Shield J E 2005 Appl. Phys. Lett. 86 191915
[16] White G K, Roberts R B, Fawcettt E 1986 J. Phys. F: Met. Phys. 16 449
[17] Nix F C, MacNair D 1941 Phys. Rev. 60 597
[18] Nahid M A I, Suzuki T 2005 J. Appl. Phys. 97 10K307
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[1] Li L, Jiang L L, Zeng Y, Liu G 2013 Chin. Phys. B 22 127503
[2] Maenosono S, Suzuki T, Saita S 2008 J. Magn. Magn. Mater. 320 L79
[3] Zhang X, Shi L, Li J, Xia Y J, Shi Z, Zhou S M 2013 Chin. Phys. B 22 117803
[4] Mizukami S, Iihama S, Inami N, Hiratsuka T, Kim G, Naganuma H, Oogane M, Ando Y 2011 Appl. Phys. Lett. 98 052501
[5] Feng C, Zhan Q, Li B H, Teng J, Li M H, Jiang Y, Yu G H 2009 Acta Phys. Sin. 58 3503 (in Chinese) [冯春, 詹倩, 李宝河, 滕蛟, 李明华, 姜勇, 于广华 2009 58 3503]
[6] Liu L W, Dang H G, Sheng W, Wang Y, Cao J W, Bai J M, Wei F L 2013 Chin. Phys. B 22 047503
[7] Wang Y, Wang R, Xie H L, Bai J M, Wei F L 2013 Chin. Phys. B 22 068506
[8] Ho P, Evans R F L, Chantrell R W, Han G C, Chow G M, Chen J S 2011 Appl. Phys. Lett. 99 162503
[9] McCallum A T, Krone P, Springer F, Brombacher C, Albrecht M, Dobisz E, Grobis M, Weller D, Hellwig O 2011 Appl. Phys. Lett. 98 242503
[10] Laenens B, Almeida F M, Planckaert N, Temst K, Meersschaut J, Vantomme A, Rentenberger C, Rennhofer M, Sepiol B 2009 J. Appl. Phys. 105 073913
[11] Sun A C, Hsu J H, Huang H L, Kuo P C 2006 J. Appl. Phys. 99 08E709
[12] Sun A C, Yuan F T, Hsu J H 2010 J. Phys.: Conf. Ser. 200 102009
[13] Landau L D, Lifshitz E M 1984 Electrodynamics of Continuous Media (2nd Ed.) (New York: Pergamon Press) p138
[14] Cao J, Cai J, Liu Y, Yang Z, Wei F, Xia A, Han B, Bai J 2006 J. Appl. Phys. 99 08F901
[15] Rasmussen P, Rui X, Shield J E 2005 Appl. Phys. Lett. 86 191915
[16] White G K, Roberts R B, Fawcettt E 1986 J. Phys. F: Met. Phys. 16 449
[17] Nix F C, MacNair D 1941 Phys. Rev. 60 597
[18] Nahid M A I, Suzuki T 2005 J. Appl. Phys. 97 10K307
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