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Magnetostatic Coupling Between two Nanowires of Different Width
Hanseok Lee,Seungho Kim,Youngwook Chang,Kyung-Hwa Yoo,J. Lee 한국자기학회 2009 Journal of Magnetics Vol.14 No.1
The magnetostatic interaction between the two magnetic nanowires was studied by using the longitudinal magneto-optical Kerr effect (MOKE). For this purpose two magnetic nanowires having different widths (400 ㎚, 800 ㎚) were fabricated on an Si substrate with electron beam lithography and the lift-off method. Magnetic hysteresis loops measured by MOKE showed double switching behavior, corresponding to the separated switching fields of each wire. The switching field of the narrow wire was greatly affected by the separation between the two wires. Based on how the switching field changes with decreasing separation, it is concluded that the magnetostatic field of the 800-㎚ wire strongly affects the switching of the 400-㎚ wire when the separation is less than 0.5 ㎛.