铁磁性纳米环是一种纳米尺寸的环状实体,由于具备高密度磁存储的能力,被认为是下一代高性能存储器——磁随机存储器(MRAM)的重要结构单元.利用聚苯乙烯微球模板法制备了单分散的坡莫合金Ni75Fe25(NiFe)纳米环,并用扫描电子显微镜(SEM)表征了纳米环的分布情况；用振动样品磁强计(VSM)测量了NiFe纳米环的磁化曲线,显示出两种磁状态,即涡旋态(Vortex state)和双畴态(Onion state),并利用OOMMF软件对NiFe纳米环的磁化翻转过程进行微磁模拟,观察到纳米环不同磁化状态下的自旋组态.
参考文献
| [1] | Zhu J P;Zheng Youfeng;Gary A .Ultrahigh density vertical magnetoresistive random accessmemory[J].Journal of Applied Physics,2000,87(09):6668. |
| [2] | Zhu FQ;Chern GW;Tchernyshyov O;Zhu XC;Zhu JG;Chien CL .Magnetic bistability and controllable reversal of asymmetric ferromagnetic nanorings[J].Physical review letters,2006(2):7205-1-7205-4-0. |
| [3] | Lopez-Diaz L.;Klaui M.;Bland JAC.;Rothman J. .Vortex formation in magnetic narrow rings: The role of magneto-crystalline anisotropy[J].Journal of Applied Physics,2001(11 Pt.2):7579-7581. |
| [4] | Klaui M;Rothman J;Lopez-Diaz L et al.Vortex circulation control in mesoscopic ring magnets[J].Applied Physics Letters,2001,78(21):3268. |
| [5] | Subramani A;Geerpuram D;Baskaran V;Friedlund J;Metlushko V .Precise control of the vortex chirality in magnetic nano-rings with deliberately introduced asymmetry[J].Physica, C. Superconductivity and its applications,2006(0):293-298. |
| [6] | Cong Feng;K.M. Liew .Energetics and structures of carbon nanorings[J].Carbon: An International Journal Sponsored by the American Carbon Society,2009(7):1664-1669. |
| [7] | Somaschini, C;Bietti, S;Koguchi, N;Sanguinetti, S .Fabrication of Multiple Concentric Nanoring Structures[J].Nano letters,2009(10):3419-3424. |
| [8] | Wen Zhang;Stephan Haas .Phase diagram of magnetization reversal processes in nanorings[J].Physical review, B. Condensed matter and materials physics,2010(6):064433:1-064433:6. |
| [9] | Hunt R P .A magnetoresistive readout transducer[J].IEEE Transactions on Magnetics,1971,7(01):150. |
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