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By inserting a Pt spacer between ferromagnetic (FM)/antiferromagnetic (FeMn) coumpling systems or by doping Pt element in the AFM layer, the depth dependence of Pt spacer and the thickness dependence of Pt doping layer on exchange bias (Hex) and coercivity (Hc) are investigated. The results indicate that the number of uncompensated spin moments (UCSs) of NiFe/FeMn(dPt)/Pt/FeMn increases as a result of inserting Pt spacer, which enhances Hex and Hc of the system. Also, the distribution depth about 1.3 nm of UCS of FeMn in NiFe/FeMn system is inferred. Besides, by doping Pt element in FeMn near the FM/FeMn interlayer, we find that the Hex of the system is enhanced efficiently, which is caused by the huge increase of the number of UCSs in the system.
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Keywords:
- magnetic multilayer /
- exchange coupling /
- Pt spacer /
- uncompensated spin moment
[1] Dieny B 1994 J. Magn. Magn. Mater. 136 335
[2] Parkin S S P, Jiang X, Kaiser C, Panchula A, Roche K, Samant M 2003 Proc. IEEE 91 661
[3] Park B G, Wunderlich J, Martí X, Holý V, Kurosaki Y, Yamada M, Yamamoto H, Nishide A, Hayakawa J, Takahashi H, Shick A B, Jungwirth T 2011 Nature Mater. 10 347
[4] Meiklejohn W H, Bean C P 1956 Phys. Rev. 102 1413
[5] Mauri D, Siegmann H C, Bagus P S, Kay E 1987 J. Appl. Phys. 62 3047
[6] Malozemff A P 1987 Phys. Rev. B 35 3679
[7] Koon N C 1997 Phys. Rev. Lett. 78 4865
[8] Nowak U, Usadel K D, Keller J, Miltényi P, Beschoten B, Güntherodt G 2002 Phys. Rev. B 66 014430
[9] Keller J, Miltényi P, Beschoten B, Güntherodt G, Nowak U, Usadel K D 2002 Phys. Rev. B 66 014431
[10] Nogués J, Schuller I K 1999 J. Magn. Magn. Mater. 192 203
[11] Takano K, Kodama R H, Berkowitz A E, Cao W, Thomas G 1997 Phys. Rev. Lett. 79 1130
[12] Gloanec M, Rioual S, Lescop B, Zuberek R, Szymczak R, Aleshkevych P, Rouvellou B 2010 Phys. Rev. B 82 144433
[13] Paul A 2010 Appl. Phys. Lett. 97 032505
[14] Nolting F, Scholl A, Stöhr J, Seo J W, Fompeyrine J, Siegwart H, Locquet J P, Anders S, Lüning J, Fullerton E E, Toney M F, Scheinfein M R, Padmore H A 2000 Nature 405 767
[15] Ohldag H, Scholl A, Nolting F, Arenholz E, Maat S, Young A T, Carey M, Stöhr J 2003 Phys. Rev. Lett. 91 017203
[16] Morales R, Li Z P, Olamit J, Liu K, Alameda J M, Schuller I K 2009 Phys. Rev. Lett. 102 097201
[17] Mishra S K, Radu F, Valencia S, Schmitz D, Schierle E, Dürr H A, Eberhardt W 2010 Phys. Rev. B 81 212404
[18] Gökemeijer N J, Ambrose T, Chien C L 1997 Phys. Rev. Lett. 79 4270
[19] Lechevallier L, Zarefy A, Lardé R, Chiron H, Le Breton J M, Baltz V, Rodmacq B, Dieny B 2009 Phys. Rev. B 79 174434
[20] Ali M, Marrows C H, Hickey B J 2008 Phys. Rev. B 77 134401
[21] Fu Y Q, Liu Y, Jin C, Yu G H 2009 Acta Phys. Sin. 58 7977 (in Chinese) [付艳强,刘洋,金川,于广华 2009 物理学报 58 7977]
[22] Urazhdin S, Tabor P, Lim W L 2008 Phys. Rev. B 78 052403
[23] Ma M, Cai L, Wang X F, Hu J G 2007 Acta Phys. Sin. 56 529 (in Chinese) [马梅,蔡蕾,王兴福, 胡经国 2007 物理学报 56 529]
[24] Liu Y, Jin C, Fu Y Q, Teng J, Liu M H, Liu Z Y, Yu G H 2008 J. Phys. D 41 205006
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[1] Dieny B 1994 J. Magn. Magn. Mater. 136 335
[2] Parkin S S P, Jiang X, Kaiser C, Panchula A, Roche K, Samant M 2003 Proc. IEEE 91 661
[3] Park B G, Wunderlich J, Martí X, Holý V, Kurosaki Y, Yamada M, Yamamoto H, Nishide A, Hayakawa J, Takahashi H, Shick A B, Jungwirth T 2011 Nature Mater. 10 347
[4] Meiklejohn W H, Bean C P 1956 Phys. Rev. 102 1413
[5] Mauri D, Siegmann H C, Bagus P S, Kay E 1987 J. Appl. Phys. 62 3047
[6] Malozemff A P 1987 Phys. Rev. B 35 3679
[7] Koon N C 1997 Phys. Rev. Lett. 78 4865
[8] Nowak U, Usadel K D, Keller J, Miltényi P, Beschoten B, Güntherodt G 2002 Phys. Rev. B 66 014430
[9] Keller J, Miltényi P, Beschoten B, Güntherodt G, Nowak U, Usadel K D 2002 Phys. Rev. B 66 014431
[10] Nogués J, Schuller I K 1999 J. Magn. Magn. Mater. 192 203
[11] Takano K, Kodama R H, Berkowitz A E, Cao W, Thomas G 1997 Phys. Rev. Lett. 79 1130
[12] Gloanec M, Rioual S, Lescop B, Zuberek R, Szymczak R, Aleshkevych P, Rouvellou B 2010 Phys. Rev. B 82 144433
[13] Paul A 2010 Appl. Phys. Lett. 97 032505
[14] Nolting F, Scholl A, Stöhr J, Seo J W, Fompeyrine J, Siegwart H, Locquet J P, Anders S, Lüning J, Fullerton E E, Toney M F, Scheinfein M R, Padmore H A 2000 Nature 405 767
[15] Ohldag H, Scholl A, Nolting F, Arenholz E, Maat S, Young A T, Carey M, Stöhr J 2003 Phys. Rev. Lett. 91 017203
[16] Morales R, Li Z P, Olamit J, Liu K, Alameda J M, Schuller I K 2009 Phys. Rev. Lett. 102 097201
[17] Mishra S K, Radu F, Valencia S, Schmitz D, Schierle E, Dürr H A, Eberhardt W 2010 Phys. Rev. B 81 212404
[18] Gökemeijer N J, Ambrose T, Chien C L 1997 Phys. Rev. Lett. 79 4270
[19] Lechevallier L, Zarefy A, Lardé R, Chiron H, Le Breton J M, Baltz V, Rodmacq B, Dieny B 2009 Phys. Rev. B 79 174434
[20] Ali M, Marrows C H, Hickey B J 2008 Phys. Rev. B 77 134401
[21] Fu Y Q, Liu Y, Jin C, Yu G H 2009 Acta Phys. Sin. 58 7977 (in Chinese) [付艳强,刘洋,金川,于广华 2009 物理学报 58 7977]
[22] Urazhdin S, Tabor P, Lim W L 2008 Phys. Rev. B 78 052403
[23] Ma M, Cai L, Wang X F, Hu J G 2007 Acta Phys. Sin. 56 529 (in Chinese) [马梅,蔡蕾,王兴福, 胡经国 2007 物理学报 56 529]
[24] Liu Y, Jin C, Fu Y Q, Teng J, Liu M H, Liu Z Y, Yu G H 2008 J. Phys. D 41 205006
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