Linearly shifting ferromagnetic resonance response of La_(0.7)Sr_(0.3)MnO_(3) thin film for body temperature sensors  

作　　者：Weixiao HOU Yufei YAO Yaojin LI Bin PENG Keqing SHI Ziyao ZHOU Jingye PAN Ming LIU Jifan HU 

机构地区：[1]Laboratory of Magnetic and Electric Functional Materials and the Applications,The Key Laboratory of Shanxi Province,College of Material Science and Technology,Taiyuan University of Science and Technology,Taiyuan 030024,China [2]Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education&International Center for Dielectric Research,School of Electronic and Information Engineering State Key Laboratory for Mechanical Behavior of Materials and International Joint Laboratory for Micro/Nano Manufacture and Measurement Technology,Xi’an Jiaotong University,Xi’an 710049,China [3]Department of Intensive Care,Precision Medicine Center Laboratory,The First Affiliated Hospital of Wenzhou Medical University,Wenzhou 325000,China

出　　处：《Frontiers of Materials Science》2022年第1期111-117,共7页材料学前沿（英文版）

基　　金：This work was supported by the Doctoral Startup Foundation of Taiyuan University of Science and Technology(Grant No.20202042);the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi(Grant No.2021L303);the Excellent Doctoral Foundation of Shanxi Province(Grant No.20212044);the National Key R&D Program of China(Grant No.2018YFB0407601);the National Natural Science Foundation of China(Grant Nos.11534015,51602244 and 11804266);the National 111 Project of China(Grant No.B14040);the Fundamental Research Funds for the Central Universities(Grant No.xzy022019069).

摘　　要：Human body temperature not only reflects vital signs,but also affects the state of various organs through blood circulation,and even affects lifespan.Here a wireless body temperature detection scheme was presented that the temperature was extracted by investigating the out-of-plane(OP)ferromagnetic resonance(FMR)field of 10.2 nm thick La_(0.7)Sr_(0.3)MnO_(3)(LSMO)film using electron paramagnetic resonance(EPR)technique.Within the range of 34-42℃,the OP FMR field changes linearly with the increasing or decreasing temperature,and this variation comes from the linear responses of magnetization to the fluctuant temperature.Using this method,a tiny temperature change(<0.1℃)of organisms can be detected accurately and sensitively,which shows great potential in body temperature monitoring for humans and mammals.

关 键 词：body temperature ferromagnetic resonance La0.7Sr0.3MnO3 film linear response 

分 类 号：TB3[一般工业技术—材料科学与工程]