Abstract
Ferromagnetic metallic manganites, such as La2/3Ca1/3MnO3 (LCMO), are employed as electrodes in magnetic tunnel junctions (MTJs), which are heterostructures using ferromagnetic electrodes and insulating nanometric barriers. Different effects arising at the bare electrode or at the interfaces can affect the physical properties of the final device. Among them we highlight here the elastic deformation due to lattice parameter mismatch, the plastic strain relaxation, and possible stoichiometry changes through interdiffusion or segregation of the species. It has been observed that when using manganites in MTJs, the measurend magnetoresistane drops to zero at a temperature well below the Curie temperature of the bulk material. It has been recently shown that the magnetic properties of, simultaneously grown, epitaxial manganite films of different texture largely differ [1]. It has been suggested that this intriguing observation is related to anisotropic elastic properties of the manganite latice, although microstrutural analysis is not yet reported.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
