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The effective magnetic field caused by exchange coupling between a ferromagnetic and an antiferromagnetic bilayer and its magnetic anisotropy have been investigated by means of ferromagnetic resonance. It was shown that the exchange bias phenomenon occurrence and its positive or negative characteristic for ferromagnetic/antiferromagnetic bilayer can be identified from its magnetic resonance spectrum. In addition, when the field was applied along different crystalline directions, the behavior of magnetic resonance field will be changed, and is closely dependent on the magnetocrystalline anisotropy and unidirectional anisotropy induced by the interface coupling in ferromagnetic/antiferromagnetic bilayer. Anomalies in the ferromagnetic resonance frequency studied as functions of applied field, including its orientation and strength, are interpreted as evidence for the four fold anisotropy and unidirectional anisotropy. Our conclusions are in good agreement with the related experiments.
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Keywords:
- ferromagnetic/antiferromagnetic bilayer /
- exchange coupling /
- ferromagnetic resonance /
- unidirectional anisotropy
[1] Meiklejohn W H, Bean C P 1956 Phys. Rev. 102 1413
[2] Meiklejohn W H, Bean C P 1957 Phys. Rev. 105 904
[3] Stamps R L 2000 J. Phys. D 33 R247
[4] Pan J, Tao Y C, Hu J G 2006 Aata. Phys. Sin. 55 3032 (in Chinese) [潘 靖、陶永春、胡经国 2006 55 3032]
[5] Dieny B 1994 J. Magn. Magn. Mater 136 335
[6] Heim D E, Fontana Jr R E, Tsang C 1994 IEEE Trans. Magn. 30 316
[7] Daughton J M, Chen Y J 1993 IEEE Trans. Magn. 29 2705
[8] Noguès J, Schuller I K 1999 J. Magn. Magn. Mater 192 203
[9] Xi H, White R M 2000 Phys. Rev. B 61 80
[10] McMichael R D, Stiles M D, Chen P J, Egelhoff W F 1998 Phys. Rev. B 58 8605
[11] Mathieu C, Bauer M, Hillebrands B, Fassbender J, Guntherodt G, Jungblut R, Kohlhepp J, Reinders A, 1998 J. Appl. Phys. 83 2863
[12] Miltenyi P, Gruyters M, Guntherodt G, Nogues J, Schuller I K 1999 Phys. Rev. B 59 3333
[13] Xi H, White R M, Rezende S M 2000 J. Appl. Phys. 87 4960
[14] Wee L, Stamps R L, Malkinski L, Celinski Z 2004 Phys. Rev. B 69 134426
[15] Pechan M J, Bennett D, Teng N, Leighton C, Noguès J, Schuller I K 2002 Phys. Rev. B 65 064410
[16] Layadi A 2000 J. Appl. Phys. 87 1429
[17] Pan J, Zhou L, Tao Y C, Hu J G 2007 Aata. Phys. Sin. 56 3521 (in Chinese) [潘 靖、周 岚、陶永春、胡经国 2007 56 3521]
[18] Pan J, Zhou L, Hu J G 2009 Aata. Phys. Sin. 58 6487 (in Chinese) [潘 靖、周 岚、胡经国 2009 58 6487]
[19] Hu J G, Jin G J, Ma Y Q 2002 J. Appl. Phys. 91 2180
[20] Smit J, Beljers H G 1955 Philips Res. Rep. 10 113
[21] Morrish A H 1980 The Physical Principles of Magnetism (New York:Krieger)
[22] Kennewell K J, Ji X, Hu J G, Krishnan K M, Stamps R L 2007 J. Appl. Phys. 101 09E518
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[1] Meiklejohn W H, Bean C P 1956 Phys. Rev. 102 1413
[2] Meiklejohn W H, Bean C P 1957 Phys. Rev. 105 904
[3] Stamps R L 2000 J. Phys. D 33 R247
[4] Pan J, Tao Y C, Hu J G 2006 Aata. Phys. Sin. 55 3032 (in Chinese) [潘 靖、陶永春、胡经国 2006 55 3032]
[5] Dieny B 1994 J. Magn. Magn. Mater 136 335
[6] Heim D E, Fontana Jr R E, Tsang C 1994 IEEE Trans. Magn. 30 316
[7] Daughton J M, Chen Y J 1993 IEEE Trans. Magn. 29 2705
[8] Noguès J, Schuller I K 1999 J. Magn. Magn. Mater 192 203
[9] Xi H, White R M 2000 Phys. Rev. B 61 80
[10] McMichael R D, Stiles M D, Chen P J, Egelhoff W F 1998 Phys. Rev. B 58 8605
[11] Mathieu C, Bauer M, Hillebrands B, Fassbender J, Guntherodt G, Jungblut R, Kohlhepp J, Reinders A, 1998 J. Appl. Phys. 83 2863
[12] Miltenyi P, Gruyters M, Guntherodt G, Nogues J, Schuller I K 1999 Phys. Rev. B 59 3333
[13] Xi H, White R M, Rezende S M 2000 J. Appl. Phys. 87 4960
[14] Wee L, Stamps R L, Malkinski L, Celinski Z 2004 Phys. Rev. B 69 134426
[15] Pechan M J, Bennett D, Teng N, Leighton C, Noguès J, Schuller I K 2002 Phys. Rev. B 65 064410
[16] Layadi A 2000 J. Appl. Phys. 87 1429
[17] Pan J, Zhou L, Tao Y C, Hu J G 2007 Aata. Phys. Sin. 56 3521 (in Chinese) [潘 靖、周 岚、陶永春、胡经国 2007 56 3521]
[18] Pan J, Zhou L, Hu J G 2009 Aata. Phys. Sin. 58 6487 (in Chinese) [潘 靖、周 岚、胡经国 2009 58 6487]
[19] Hu J G, Jin G J, Ma Y Q 2002 J. Appl. Phys. 91 2180
[20] Smit J, Beljers H G 1955 Philips Res. Rep. 10 113
[21] Morrish A H 1980 The Physical Principles of Magnetism (New York:Krieger)
[22] Kennewell K J, Ji X, Hu J G, Krishnan K M, Stamps R L 2007 J. Appl. Phys. 101 09E518
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