Sign reversal and manipulation of anomalous Hall resistivity in facing-target sputtered Pt/Mn_(4)N bilayers  

作　　者：Ze-Yu Zhang Jia-Wei Jiang Xiao-Hui Shi Xiang Liu Xia Chen Zhi-Peng Hou Wen-Bo Mi 

机构地区：[1]Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology,School of Science,Tianjin University,Tianjin,300354,China [2]School of Physics and Electronic Engineering,Linyi University,Linyi,276000,China [3]College of Science,Civil Aviation University of China,Tianjin,300300,China [4]Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute for Advanced Materials,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou,510006,China

出　　处：《Rare Metals》2023年第2期591-601,共11页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.52071233)。

摘　　要：The magnetic and electronic transport properties manipulated by spin-orbit torque have been devoted much attention as they show a great promise for future spintronic devices.Here,the spin dependent transport properties of the facing-target sputtered Pt/Mn_(4)N bilayers on MgO(001)substrates have been investigated systematically.The Hall resistivity of Pt/Mn_(4)N bilayers is strongly dependent on temperature,applied current intensity,Mn_(4)N and Pt layer thicknesses.The temperature-dependent sign reversal of anomalous Hall resistivity appears in Pt/Mn_(4)N bilayers,which is dominated by the competition between the magnetic proximity and spin Hall effects.Besides,the magnitude of anomalous Hall resistivity can be manipulated by applied current density.The critical and saturation currents are related to Mn_(4)N and Pt layer thicknesses.Furthermore,a Dzyaloshinskii-Moriya interaction coefficient(D)of 5.63 mJ·m^(-2)is calculated in Pt/Mn_(4)N/MgO systems.The details of the anomalous Hall effects in Pt/Mn_(4)N bilayers are helpful to understand the interfacial effects between heavy metals and ferrimagnets.

关 键 词：Pt/Mn_(4)N bilayer Hall resistivity Magnetic proximity effect Spin Hall effect(SHE) DzyaloshinskiiMoriya interaction(DMI) 

分 类 号：O469[理学—凝聚态物理]