制备了一系列具有铁磁/反铁磁交换偏置作用的[NiO/Fe65Co35]10多层膜,使用振动样品磁强计(VSM)测量了样品的静磁参数,利用微带线法测量了样品4GHz-10GHz的磁谱,首次制备并测得了自然共振频率(fr)在6GHz以上,最高到f=9.6GHz的薄膜样品.结果表明交换偏置场(Hex)、各向异性场(Hua)、以及矫顽力(Hc)随铁磁层厚度(tFM)增大而减小;基于Landau-Lifishitz (L-L)方程对静磁参量和磁谱进行了比较,发现样品自然共振频率较L-L方程计算值偏大30%以上.
[NiO/Fe65 Co35]10 exchange-coupled multilayer films for high frequency applications are fabricated,and their microwave permeability is systematic studied.Both exchange bias field and ferromagnetic resonance frequency increase with decreasing Fe65 Co35 thickness.The microwave properties such as permeability and FMR frequency can be controlled by changing Fe65 Co35 thickness.Ferromagnetic resonance frequencies beyond 6 GHz are measured and reported for the first time.
参考文献
| [1] | Meiklejohn W H;Bean C P .New Magnetic Anisotropy[J].Physical Review,1956,102:1413. |
| [2] | Yelon A .Interactions in Multiplayer Magnetic Films[J].Physics of Thin Films,1971,6:205. |
| [3] | Stoecklein W;Parkin S S P;Scott J C .Ferromagnetic resonance studies of Permalloy films[J].Physical Review,1988,B 38(10):6847. |
| [4] | Dieny B;Speriosu V S;Metin S et al.Magnetotransport properties of magnetically soft spin-valve structures[J].Journal of Applied Physics,1991,69:4774. |
| [5] | Heim D.E.;Fontana R.E. Jr. .Design and operation of spin valve sensors[J].IEEE Transactions on Magnetics,1994(2):316-321. |
| [6] | Tsang C;Fontana R E;Lin T et al.Design,Fabrication Testing of Spin-Valve Read Heads for High Density Recording[J].IEEE Transactions on Magnetics,1994,30(06):3801. |
| [7] | Baumgart P M;Kliem H C;Gottfriedanacker R J et al.Dual Spin Valve Magnetoresistive Sensor[P].U.S.Patent 5,1994. |
| [8] | B. Viala;G. Visentin;P. Gaud .AF-Biased CoFe Multilayer Films With FMR Frequency at 5 GHz and Beyond[J].IEEE Transactions on Magnetics,2004(4):1996-1998. |
| [9] | Krebs J J;Lubitz P;Chaiken A et al.Observation of magnetic resonance modes of Fe layers coupled via intervening Cr(invited)[J].Journal of Applied Physics,1990,67:5920. |
| [10] | Makoto Sonehara;Takatoshi Sugiyama;Takuya Ishikawa;Kei Inagaki;Toshiro Sato;Kiyohito Yamasawa;Yoshimasa Miura .Relation Between Microwave Complex Permeability and Ferromagnetic Fe-Si Layer Thickness in Mn-Ir/Fe-Si Exchange-Coupled Film[J].IEEE Transactions on Magnetics,2006(10):2984-2986. |
| [11] | Fergen I.;Seemann K.;von der Weth A.;Schuppen A. .Soft ferromagnetic thin films for high frequency applications[J].Journal of Magnetism and Magnetic Materials,2002(1):146-151. |
| [12] | Reidy S G;Cheng L;Bailey W E .Dopants for independent control of precessional frequency and damping in Ni81Fe19(50nm)thin films Appl[J].Physics Letters,2003,82:1254. |
| [13] | J. Nogues;I.K. Schuller .Exchange bias[J].Journal of Magnetism and Magnetic Materials,1999(2):203-232. |
| [14] | Bekker V;Semann K;Leiste H .A new strip line broadband measurement evaluation for determining the complex permeability of thin ferromagnetic films J[J].Magnetism and Magnetic Materials,2004,270:327-332. |
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