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Angle-dependent spin waves in antidot bilayers |
Hu Chun-Lian (胡春莲)a, Liao Leng (廖棱)a, Stamps Rb |
a Chongqing Jiaotong University, Chongqing 400074, China; b SUPA-School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK |
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Abstract Ferromagnetic resonance is introduced to examine the microwave frequency response of NiFe/IrMn bilayers, patterned as antidot arrays. In the experiment, field direction dependence on mode is obtained by rotating the applied magnetic field. We find that at a given resonance frequency, the dependence of the resonance field on the angle has a tendency of sinusoid/cosine variation in the experiment. From micromagnetic simulation it can be seen that spin waves are localized between dots from a given mode profile. This is caused by a demagnetization distribution with a larger value in the center of the two nearest dots than that of the next-nearest dots.
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Received: 20 March 2014
Revised: 13 June 2014
Accepted manuscript online:
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PACS:
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75.30.Ds
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(Spin waves)
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75.70.Cn
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(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
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75.90.+w
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(Other topics in magnetic properties and materials)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11304407) and the Scientific Research Foundation for Returned Scholars, Ministry of Education of China (Grant No. 47). |
Corresponding Authors:
Hu Chun-Lian
E-mail: clhu@cqjtu.edu.cn
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Cite this article:
Hu Chun-Lian (胡春莲), Liao Leng (廖棱), Stamps R Angle-dependent spin waves in antidot bilayers 2014 Chin. Phys. B 23 127501
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