Dynamic selective switching in antiferromagnetically-coupled bilayers close to the spin reorientation transition

被引：11

作者：

Fernandez-Pacheco, A. ^{[1
]}

Ummelen, F. C. ^{[2
]}

Mansell, R. ^{[1
]}

Petit, D. ^{[1
]}

Lee, J. H. ^{[1
]}

Swagten, H. J. M. ^{[2
]}

Cowburn, R. P. ^{[1
]}

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Eindhoven Univ Technol, Ctr NanoMat, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands

来源：

APPLIED PHYSICS LETTERS | 2014年 / 105卷 / 09期

关键词：

MAGNETIZATION REVERSAL; FERROMAGNETIC-FILMS; ANISOTROPY;

D O I：

10.1063/1.4895032

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have designed a bilayer synthetic antiferromagnet where the order of layer reversal can be selected by varying the sweep rate of the applied magnetic field. The system is formed by two ultra-thin ferromagnetic layers with different proximities to the spin reorientation transition, coupled antiferromagnetically using Ruderman-Kittel-Kasuya-Yosida interactions. The different dynamic magnetic reversal behavior of both layers produces a crossover in their switching fields for field rates in the kOe/s range. This effect is due to the different effective anisotropy of both layers, added to an appropriate asymmetric antiferromagnetic coupling between them. Field-rate controlled selective switching of perpendicular magnetic anisotropy layers as shown here can be exploited in sensing and memory applications. (C) 2014 AIP Publishing LLC.

引用

页数：5

共 22 条

[1] The emergence of spin electronics in data storage [J].

Chappert, Claude ;

Fert, Albert ;

Van Dau, Frederic Nguyen .

NATURE MATERIALS, 2007, 6 (11) :813-823

[2] Electric-field control of magnetic domain-wall velocity in ultrathin cobalt with perpendicular magnetization [J].

Chiba, D. ;

Kawaguchi, M. ;

Fukami, S. ;

Ishiwata, N. ;

Shimamura, K. ;

Kobayashi, K. ;

Ono, T. .

NATURE COMMUNICATIONS, 2012, 3

[3] Non-collinear magnetization configuration in interlayer exchange coupled magnetic thin films [J].

Choi, J. ;

Min, B. -C. ;

Kim, J. -Y. ;

Park, B. -G. ;

Park, J. H. ;

Lee, Y. S. ;

Shin, K. -H. .

APPLIED PHYSICS LETTERS, 2011, 99 (10)

[4]

Ferré J, 2002, TOP APPL PHYS, V83, P127

[5]

Ikeda S, 2010, NAT MATER, V9, P721, DOI [10.1038/NMAT2804, 10.1038/nmat2804]

[6] Asymmetric domain nucleation and unusual magnetization reversal in ultrathin Co films with perpendicular anisotropy [J].

Iunin, Y. L. ;

Kabanov, Y. P. ;

Nikitenko, V. I. ;

Cheng, X. M. ;

Clarke, D. ;

Tretiakov, O. A. ;

Tchernyshyov, O. ;

Shapiro, A. J. ;

Shull, R. D. ;

Chien, C. L. .

PHYSICAL REVIEW LETTERS, 2007, 98 (11)

[7] Basic principles of STT-MRAM cell operation in memory arrays [J].

Khvalkovskiy, A. V. ;

Apalkov, D. ;

Watts, S. ;

Chepulskii, R. ;

Beach, R. S. ;

Ong, A. ;

Tang, X. ;

Driskill-Smith, A. ;

Butler, W. H. ;

Visscher, P. B. ;

Lottis, D. ;

Chen, E. ;

Nikitin, V. ;

Krounbi, M. .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2013, 46 (07)

[8] Magnetic anisotropy and magnetization reversal processes in Pt/Co/Pt films [J].

Kisielewski, M ;

Maziewski, A ;

Tekielak, M ;

Ferré, J ;

Lemerle, S ;

Mathet, V ;

Chappert, C .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2003, 260 (1-2) :231-243

[9] Competition between in-plane and out-of-plane magnetization in exchange-coupled magnetic films [J].

Kuch, W ;

Gao, XY ;

Kirschner, J .

PHYSICAL REVIEW B, 2002, 65 (06) :644061-644067

[10] Tuning the interlayer exchange coupling between single perpendicularly magnetized CoFeB layers [J].

Lavrijsen, R. ;

Fernandez-Pacheco, A. ;

Petit, D. ;

Mansell, R. ;

Lee, J. H. ;

Cowburn, R. P. .

APPLIED PHYSICS LETTERS, 2012, 100 (05)

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