| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Exchange Bias in NiCo/FeMn Bilayers with Stripe Domains |
| LIN Jing1, SHI Zhong1, ZHOU Shi-Ming1, ZHANG Xia2, XIA Yun-Jie2 |
| 1Surface Physics Laboratory and Department of Physics, Fudan University, Shanghai 2004332Shandong Province Key Lab Laser Polarization and Information, Qufu Normal University, Qufu 273165 |
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| Cite this article: |
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LIN Jing, SHI Zhong, ZHOU Shi-Ming et al 2009 Chin. Phys. Lett. 26 107501 |
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Abstract Exchange bias in NiCo/FeMn bilayers is established by alternating current (magnetic) field cooling, and stripe domains are induced as manifested by the ``double'' hysteresis loop. Only one resonance peak occurs at high magnetic fields in the in-plane ferromagnetic resonance spectra. The exchange field measured by both the magnetometry and ferromagnetic resonances is inversely proportional to the ferromagnetic layer thickness tFM. More remarkably, the exchange field determined by the ferromagnetic resonance is smaller than that of the magnetometry measurements. It is suggested to arise from the misalignment of the unidirectional anisotropic directions in neighboring domains.
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| Keywords:
75.30.Gw
75.60.Ch
76.50.+g
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Received: 07 May 2009
Published: 27 September 2009
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| PACS: |
75.30.Gw
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(Magnetic anisotropy)
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75.60.Ch
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(Domain walls and domain structure)
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76.50.+g
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(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
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