2014/09/25 by Himanshu Sharma, A. Tulapurkar, C. V. Tomy · 22 citations
Materials Science · Physics and Astronomy · #Anisotropy #Chemical and Physical Properties of Materials #Curie temperature #Magnetic and transport properties of perovskites and related materials #Magnetic anisotropy #Magnetization #Magnetoresistance #Multiferroics and related materials #Sign (mathematics) #Substrate (aquarium) #Thin film #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1063/1.4903236
published in Applied Physics Letters 105(22) (American Institute of Physics)
arxiv created 2014/09/25 · openalex publication_date 2014/12/01 · arxiv updated 2015/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the observation of strain induced sign reversal of anisotropic magnetoresistance (AMR) in La0.7Ca0.3MnO3 (LCMO) ultrathin films (thickness ∼ 4 nm) deposited on SrTiO3 (001) substrate (STO). We have also observed unusually large AMR (∼24%) in LCMO/STO thin films with thickness of 6 nm below but close to its Curie temperature (TC) which decreases as the film thickness increases. The sign reversal of AMR (with a maximum value of −6%) with magnetic field or temperature for the 4 nm thin film may be attributed to the increase in tensile strain in the plane of the thin film which in turn facilitates the rotation of the magnetization easy axis.