Title :
Spin Hall Magnetoresistance in CoFe2O4/Pt Films
Author :
Hao Wu ; Qintong Zhang ; Caihua Wan ; Ali, Syed Shahbaz ; Zhonghui Yuan ; Lu You ; Junling Wang ; Yongseong Choi ; Xiufeng Han
Author_Institution :
State Key Lab. of Magn., Inst. of Phys., Beijing, China
Abstract :
Pulse laser deposition and magnetron sputtering techniques have been employed to prepare MgO(001)//CoFe2O4/Pt samples. Cross section transmission electron microscope results prove that the CoFe2O4 film epitaxially grew along (001) direction. X-ray magnetic circular dichroism results show that magnetic proximity effect in this sample is negligible. Magnetoresistance (MR) properties confirm that spin Hall MR (SMR) dominates in this system. Spin Hall effect-induced anomalous Hall voltage was also observed in this sample. These results not only demonstrate the universality of SMR effect but also demonstrate the utility in spintronics of CoFe2O4 as a new type of magnetic insulator.
Keywords :
cobalt compounds; ferrites; insulating thin films; magnesium compounds; magnetic circular dichroism; magnetic epitaxial layers; magnetoresistance; metal-insulator boundaries; platinum; pulsed laser deposition; spin Hall effect; sputter deposition; transmission electron microscopy; vapour phase epitaxial growth; (001) direction; MgO(001)-CoFe2O4-Pt film samples; X-ray magnetic circular dichroism; cross-section transmission electron microscope; epitaxial growth; magnetic insulator; magnetic proximity effect; magnetron sputtering; pulse laser deposition; spin Hall effect-induced anomalous Hall voltage; spin Hall magnetoresistance; spintronics; Films; Hall effect; Magnetic fields; Magnetic hysteresis; Magnetization; Resistance; Silicon; Anomalous Hall effect; Spin Hall magnetoresistance; X-ray magnetic circular dichroism; X-ray magnetic circular dichroism (XMCD); anomalous Hall effect; ferrimagnetic insulator; spin Hall magnetoresistance (SMR);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2015.2433060
