Novel Bilayer Structures for Short Wavelength High Density Magneto-Optical Data Storage
WANG Xian-Ying1, WANG Jing2, WANG Zhan-Yong1, YANG Jun-He1
1Department of Materials Engineering, Shanghai Institute of Technology, Shanghai 2002352College of Life and Environment Sciences, Shanghai Normal University, Shanghai 200235
Novel Bilayer Structures for Short Wavelength High Density Magneto-Optical Data Storage
WANG Xian-Ying1;WANG Jing2;WANG Zhan-Yong1;YANG Jun-He1
1Department of Materials Engineering, Shanghai Institute of Technology, Shanghai 2002352College of Life and Environment Sciences, Shanghai Normal University, Shanghai 200235
摘要We report a novel bi-layer thin film structure for high density magneto-optical (MO) data storage, which combines the advantages of blue wavelength and magnetically induced superresolution (MSR) recording. A double-layer system of exchange-coupled light rare-earth (LRE) element doped NdGdFeCo and traditional TbFeCo is used as the recording medium. The experimental results demonstrate that this NdGdFeCo/TbFeCo double layer has large Kerr rotation under blue wavelength. Centre aperture detection (CAD) MSR effect with temperature rising is also observed. Theoretical calculation is also carried out to verify the experimental results. These results collectively suggest that the new bilayer structure is very promising in next generation high density MO data storage.
Abstract：We report a novel bi-layer thin film structure for high density magneto-optical (MO) data storage, which combines the advantages of blue wavelength and magnetically induced superresolution (MSR) recording. A double-layer system of exchange-coupled light rare-earth (LRE) element doped NdGdFeCo and traditional TbFeCo is used as the recording medium. The experimental results demonstrate that this NdGdFeCo/TbFeCo double layer has large Kerr rotation under blue wavelength. Centre aperture detection (CAD) MSR effect with temperature rising is also observed. Theoretical calculation is also carried out to verify the experimental results. These results collectively suggest that the new bilayer structure is very promising in next generation high density MO data storage.
WANG Xian-Ying;WANG Jing;WANG Zhan-Yong;YANG Jun-He. Novel Bilayer Structures for Short Wavelength High Density Magneto-Optical Data Storage[J]. 中国物理快报, 2008, 25(6): 2242-2245.
WANG Xian-Ying, WANG Jing, WANG Zhan-Yong, YANG Jun-He. Novel Bilayer Structures for Short Wavelength High Density Magneto-Optical Data Storage. Chin. Phys. Lett., 2008, 25(6): 2242-2245.
[1] Kawase K, Muto Y, Yamaguchi Ando K N, Maeda Y, Yamada M andKanno M 2000 SPIE 4090 232 [2] Nakajima J, Takahashi A and Terashim S 1995 IEEETrans. Magn. 31 3247 [3] Challener W A 1996 J. Appl. Phys. 79 5693 [4] Visnovsky S, Knappe B, Prosser V and Muller H R 2006 Physica Status Solidi K 38 53 [5] Wang X Y, Zhang Y P, Li Z Y, Shen D F and Gan F X 2003 Chin. Phys. Lett. 20 135 [6] Wang X Y, Zhang Y P and Gan F X 2003 Acta Opt. Sin. 23 1090 (in Chinese) [6] Hu X and Kawazoe Y 1994 Phys. Rev. B 49 3294 [7] Hu X and Kawazoe Y 1995 Phys. Rev. B 51 311 [8] Wang X Y, Fang M, Li Q H, Shen D F and Gan F X 2005 Thin Solid Films 289 181
2008, Vol. 25 
