Flexible tuning microwave permeability spectrum in [ferromagnet/antiferromagnet]n exchange-biasedmultilayer stack structure

doi:10.1088/1674-1056/22/4/047502

Abstract NiFe/[IrMn/NiFe/IrMn]₅/[NiFe/IrMn]₄/NiFe structured exchange-biased multilayer films are designed and prepared by magnetron sputtering. The static and the microwave magnetic properties are systematically investigated. The results reveal that adding partially pinned ferromagnetic layer can effectively broaden the ferromagnetic resonance linewidth toward low frequency domain. Moreover, a wideband multi-peak permeability spectrum with a 3.1-GHz linewidth is obtained by overlapping the spectra of different partially pinned ferromagnetic layers and [antiferromagnet/ferromagnet/antiferromagnet]_n stacks. Our results show that the linewidth of the sample can be feasibly tuned through controlling the proper exchange bias fields of different stacks. The designed multilayered thin films have potential application for a tunable wideband high frequency noise filter.

Keywords: magnetic multilayer thin films ferromagnetic resonance permeability spectra exchange bias

Received: 09 July 2012
Revised: 28 September 2012
Accepted manuscript online:

PACS:	75.30.Et	(Exchange and superexchange interactions)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	75.70.Cn	(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))

Fund: Project supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (Grant No. 61021061), the National Basic Research Program of China (Grant No. 2012CB933104), and the National Natural Science Foundation of China (Grant Nos. 61071028, 51171038, and 60801027).

Corresponding Authors: Jin Li-Chuan
E-mail: brooklynlichuanj@gmail.com

Cite this article:

Jin Li-Chuan (金立川), Zhang Huai-Wu (张怀武), Tang Xiao-Li (唐晓莉), Bai Fei-Ming (白飞明), Zhong Zhi-Yong (钟智勇) Flexible tuning microwave permeability spectrum in [ferromagnet/antiferromagnet]_n exchange-biasedmultilayer stack structure 2013 Chin. Phys. B 22 047502

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Flexible tuning microwave permeability spectrum in [ferromagnet/antiferromagnet]n exchange-biasedmultilayer stack structure

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Flexible tuning microwave permeability spectrum in [ferromagnet/antiferromagnet]_n exchange-biasedmultilayer stack structure