Angular dependence of asymmetric magnetoimpedance in exchange biased NiFe/IrMn multilayers

作者：da Silva R B^*; Correa M A; Silva E F; Mori T J A; Della Pace R D; Dutra R; Viegas A D C; Bohn F; Sommer R L

来源：Applied Physics Letters, 2014, 104(10): 102405.

DOI：10.1063/1.4867973

We investigate the angular dependence of asymmetric magnetoimpedance of NiFe/IrMn multilayers and explore the possibility of tuning the linear region of the magnetoimpedance curves by modifying the angle between the applied external magnetic field and exchange bias field, and probe current frequency. We quantify the sensitivity by calculating the ratio vertical bar Delta Z vertical bar/vertical bar Delta H vertical bar at low magnetic fields as a function of the frequency for samples cut with different orientations and show that considerable values in the linear region around zero field can be reached. The results extend the possibilities for application of exchange biased magnetoimpedance multilayers as probe element for the development and improvement of auto-biased linear magnetic field sensors.

• 出版日期2014-3-10