Cowburn R P. The attractions of magnetism for nanoscale data storage[J]. Phil Trans R Soc Lond,2000,A358(1765):281-301.
[2]
Jung H S, Velu E M T, Malhotra S S, et al. CoCrPtO-based granular composite perpendicular recording media[J]. IEEE Trans Magn,2007,43(6):2088-2090.
[3]
Giri S, Trewyn B G, Stellmaker M P, et al. Stimuli-responsive controlled-release delivery system based on mesoporous silica nanorods capped with magnetic nanoparticles[J]. Angew Chem Int Ed,2005,44(32):5038-5044.
[4]
Bergemann C, Muller-Schulte D. Magnetic ion-exchange nano- and microparticles for medical, biochemical and molecular biological applications[J]. J Magn Magn Mater,1999,194(1/3):45-52.
[5]
Kneller E F, Hawig R. The exchange-spring magnet: A new material principle for permanent magnets[J]. IEEE Trans Magn,1991,27(4):3588-3600.
[6]
Skomski R, Coey J M D. Giant energy product in nanostructured two-phase manets[J]. Phys Rev,1993,B48(21):15812-15816.
[7]
Asti G, Solzi M, Ghidini M, et al. Micromagnetic analysis of exchange-coupled hard-soft planar nanocomposites[J]. Phys Rev,2004,B69(17):174401.
[8]
Asti G, Ghidini M, Pellicelli R, et al. Magnetic phase diagram and demagnetization processes in perpendicular exchange-spring multilayers[J]. Phys Rev,2006,B73(9):094406.
[9]
Zhao G P, Deng Y, Zhang H W, et al. Thickness dependent magnetic reversal process and hysteresis loops in exchange-coupled hard-soft trilayers[J]. J Appl Phys,2010,108(9):093928.
[10]
Zhao G P, Wang X L. Nucleation, pinning, and coercivity in magnetic nanosystems: An analytical micromagnetic approach[J]. Phys Rev,2006,B74(1):012409.
[11]
Zhao G P, Zhou G, Zhang H W, et al. Angular dependence of magnetic reversal in two-phased nanolayers[J]. Comput Mater Sci,2008,44(1):117-121.
Arcas J, Hernando A, Barandiaran J M, et al. Soft to hard magnetic anisotropy in nanostructured magnets[J]. Phys Rev,1998,B58(9):5193-5196.
[21]
Han G B, Gao R W, Fu S, et al. Effective anisotropy between magnetically soft and hard grains in nanocomposite magnets[J]. Appl Phys,2005,A81(3):579-582.
[22]
Feng W C, Gao R W, Yan S S, et al. Effects of phase distribution and grain size on the effective anisotropy and coercivity of nanocomposite Nd2Fe14B/α-Fe magnets[J]. J Appl Phys,2005,98(4):044305.