Publication Date:
2020
Description:
〈h3〉Abstract〈/h3〉
〈p〉In this work, the magnetic and transport properties of La〈sub〉0.7〈/sub〉Ca〈sub〉0.3〈/sub〉MnO〈sub〉3〈/sub〉 (LCMO) films are compared with films capped with Fe〈sub〉3〈/sub〉O〈sub〉4〈/sub〉. The capping layers for films with the thicknesses of 50 nm and 100 nm broadened the metal–insulator transition, though they produced rather few changes to other properties. The results were dramatically different for a 20-nm-thick LCMO layer compared to other thicker films. The metal–insulator transition temperature increased from 160 to 200 K for capped LCMO film despite the fact that the capping layer reduced the magnitude of magnetization. The temperature of maximum magnetoresistance (MR) shifted from 115 to 185 K. However, its magnitude, 1500% at 5 T, remained unchanged due to capping. This behavior was attributed to atomic inter-diffusion at the LCMO/Fe〈sub〉3〈/sub〉O〈sub〉4〈/sub〉 interface which resulted in the generation of Mn〈sup〉2+〈/sup〉 ions. These results are of great significance and suggest a promising future for both the fundamental research and device applications involving thin films of LCMO.〈/p〉
Print ISSN:
0022-2461
Electronic ISSN:
1573-4803
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
