Heat-assisted magnetization switching in elongated submicrometer permalloy struc

2020-02-14 23:44:03

current switching magnetic effect aluminum

责任者: Atkinson, D.;Cowburn, R.P. 单位: Dept. of Phys., Univ. of Durham, UK 来源出处: Applied Physics Letters(Appl. Phys. Lett. (USA)),2004/08/23,85(8):1386-8 摘要: The effect on switching behavior of locally heating individual Permalloy nanostructures is reported. The samples consisted of isolated magnetic structures with an aluminum conducting strip on top at one end of each structure, through which direct current passed to heat the nanostructure. Magnetization switching in individual nanostructures was detected using the magneto-optic Kerr effect. The average coercivity fell with increasing current in the aluminum strip by up to 20%, but, interestingly, the change in absolute magnitude of the coercivity was similar for nanowires of different width for current densities approaching 1011 A m-2 in the aluminum conductor. The temperature rise at this current density is less than 40 K 关键词: aluminium;coercive force;current density;Kerr magneto-optical effect;magnetic hysteresis;magnetic structure;magnetic switching;nanowires;Permalloy;magnetization switching;elongated submicrometer permalloy structures;permalloy nanostructures;magnetic structures;aluminum conducting strip;magneto-optic Kerr effect;coercivity;nanowires;current density;magnetic hysteresis;40 K;Al;NiFe