Magnetization switching detection of a single permalloy nanomagnet using magneto-transport measurements

作者：Nguyen V D; Laczkowski P; Marty A; Notin L; Beigne C; Vila L^*; Attane J P

来源：Journal of Applied Physics, 2014, 115(5): 053912.

DOI：10.1063/1.4864216

The magnetoresistance of Permalloy (NiFe) nanomagnets is studied at room temperature. For low aspect ratios, the main contribution is the anisotropic magnetoresistance, whereas for higher aspect ratio this contribution vanishes. We show that magnon magnetoresistance measurements need to be taken into account to detect precisely the magnetization switching of a single NiFe nanomagnet of dimensions 200 x 32 x 30 nm(3). Experimental results are found to be in agreement with micromagnetic simulations and we give the analytical expressions to compute this effect. The measurement of the angular dependence on the magnetization switching allows studying the magnetization reversal mode of a single nanomagnet.

• 出版日期2014-2-7
• 单位中国地震局