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退火对IrMn基磁隧道结多层膜热稳定性的影响

闫静 祁先进 王寅岗

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退火对IrMn基磁隧道结多层膜热稳定性的影响

闫静, 祁先进, 王寅岗

Influence of annealing on thermal stability of IrMn-based magnetic tunnel juctions

Yan Jing, Qi Xian-Jin, Wang Yin-Gang
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  • 采用磁控溅射方法制备了结构为IrMn/CoFe/AlOx/CoFe的磁性隧道结多层膜,样品置于真空磁场中进行退火处理. 将在不同温度退火的磁隧道结结构多层膜置于负饱和场中等待,研究退火温度对样品热稳定性的影响. 结果表明:退火提高了多层膜反铁磁层的单轴各向异性能,增加了样品的交换偏置;随着负饱和场等待时间的延长,被钉扎层的磁滞回线向正场偏移,交换偏置单调减小,但退火减弱了这种趋势.
    The magnetic tunnel junction with a structure of IrMn/CoFe/AlOx/CoFe is deposited by magnetron sputtering and annealed at different temperatures in a magnetic field of parallel to the orienting field. Vibrating sample magnetometer is used to record the magnetic hysteresis loop at room temperature, and scanning probe microscope is used to record the interface morphology. The influence of annealing on thermal stability of the magnetic tunnel junction is investigated by holding the film in its negative saturation field. After annealing, the exchange bias increases due to the enhancement of unidirectional anisotropy of antiferromagnetic layer. The recoil loop of the pinned ferromagnetic layer shifts towards the positive field, and the exchange bias field decreases monotonically, with the film held in a negative saturation field, whereas annealing reduces the reduction speed of Hex.
    • 基金项目: 国家自然科学基金(批准号:50671048)资助的课题.
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    Ma Q L, Feng J F, Feng G, Oguz K, Han X F, Coey J M D 2010 J. Magn. Magn. Mater. 322 108

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    Park C M, Min K L, Shin K H 1996 J. Appl. Phys. 79 6228

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    Shen J X, Kief M T 1996 J. Appl. Phys. 79 5008

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    Nascimento V P, Passamani E C, Alvarenga A D, Pelegrini F, Biondo A, Saitovitch E B 2008 J. Magn. Magn. Mater. 320 e272

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    Km J V, Stamps R L 2001 Appl. Phys. Lett. 79 2785

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    Wang Y G, Petford-Long A K 2004 J. Magn. Magn. Mater. 279 82

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    Hughes T, OGrady K, Laidler H, Chantrell R W 2001 J. Magn. Magn. Mater. 235 329

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    Hughes T, Laidler H, OGrady K 2001 J. Appl. Phys. 89 5585

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    Vallejo-Fernandez G, Fernandez-outon L E, OGrady K 2008 J. Appl. Phys. 103 07C101

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    Xi H W, Franzen S, Mao S, White R M 2007 Phys. Rev. B 75 014434

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  • [1]

    Victora R H, Chen X 2010 IEEE Trans. Magn. 46 702

    [2]

    Lee K, Kang S H 2010 IEEE Trans. Magn. 46 1537

    [3]
    [4]

    Cao J, Freitas P P 2010 J. Appl. Phys. 107 09E712

    [5]
    [6]
    [7]

    Meiklejohn W H, Bean C P 1956 Phys. Rev. 102 1413

    [8]

    Qi X J, Wang Y G, Zhou G H, Li Z Q, Guo M 2010 Chin. Phys. B 19 037503

    [9]
    [10]
    [11]

    Chai C L, Teng J, Yu G H, Zhu F W, Lai W Y, Xiao J M 2002 Acta Phys. Sin. 51 1846 (in Chinese)[柴春林、滕 蛟、于广华、朱逢吾、赖武彦、肖纪美 2002 物理学报 51 1846]

    [12]

    Li F F, Sharif R, Jiang L X, Zhang X Q, Han X F, Wang Y, Zhang Z 2005 J. Appl. Phys. 98 113710

    [13]
    [14]
    [15]

    Ma Q L, Feng J F, Feng G, Oguz K, Han X F, Coey J M D 2010 J. Magn. Magn. Mater. 322 108

    [16]

    Feng Y Q, Hou L N, Zhu T, Yao S D, Zhan W S 2005 Acta Phys. Sin. 54 4340 (in Chinese) [冯玉清、侯利娜、朱 涛、姚淑德、詹文山 2005 物理学报 54 4340]

    [17]
    [18]

    Li H H, Freitas P P, Wang Z J, Sousa J B, Gogol P, Chapman J 2001 J. Appl. Phys. 89 6904

    [19]
    [20]

    Park C M, Min K L, Shin K H 1996 J. Appl. Phys. 79 6228

    [21]
    [22]
    [23]

    Shen J X, Kief M T 1996 J. Appl. Phys. 79 5008

    [24]

    Nascimento V P, Passamani E C, Alvarenga A D, Pelegrini F, Biondo A, Saitovitch E B 2008 J. Magn. Magn. Mater. 320 e272

    [25]
    [26]

    Km J V, Stamps R L 2001 Appl. Phys. Lett. 79 2785

    [27]
    [28]
    [29]

    Wang Y G, Petford-Long A K 2004 J. Magn. Magn. Mater. 279 82

    [30]
    [31]

    Hughes T, OGrady K, Laidler H, Chantrell R W 2001 J. Magn. Magn. Mater. 235 329

    [32]
    [33]

    Hughes T, Laidler H, OGrady K 2001 J. Appl. Phys. 89 5585

    [34]

    Vallejo-Fernandez G, Fernandez-outon L E, OGrady K 2008 J. Appl. Phys. 103 07C101

    [35]
    [36]

    Xi H W, Franzen S, Mao S, White R M 2007 Phys. Rev. B 75 014434

    [37]
计量
  • 文章访问数:  6059
  • PDF下载量:  883
  • 被引次数: 0
出版历程
  • 收稿日期:  2010-09-28
  • 修回日期:  2010-11-29
  • 刊出日期:  2011-04-05

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