Figure 6

Magneto-transport characterisation of a Nb(15)/Pt(0.8)/Co(1)/Pt(0.6)/Cu(5)/MgO(3) multilayer. The sample is cooled down from room temperature in the absence of a magnetic field. Subsequent data is recorded at \(T =\) 4 K. Degaussing takes place before each measurement. During measurements the field is swept at a rate of 25 Oe/s. Forward and reverse field sweeps are indicated by red and pink markers respectively. (a) Hall resistivity percentage change, \({\Delta }\rho_{xy}\), as a function of out-of-plane applied field, \(H_{z}\). Note, \({\Delta }\rho_{xy} = \left( {\rho_{xy} \left( H \right) - \rho_{xy,0} } \right)/\rho_{xy,0}\), where \(\rho_{xy,0} = \left[ {\rho_{forward} \left( {H = 0} \right) - \rho_{reverse} \left( {H = 0} \right)} \right]/2\). Inset, schematic of the measurement orientation. Yellow squares at the corners indicate electrical contact points. (b) AMR resistivity percentage change, \({\Delta }\rho_{xx}\), as a function of in-plane applied field, \(H_{x}\). \({\Delta }\rho_{xx} = \left( {\rho_{xx} \left( H \right) - \rho_{xx} \left( {H = 0} \right)} \right)/\rho_{xx} \left( {H = 0} \right)\).