Ultrasonic evidence of an uncorrelated cluster formation temperature in manganites with first-order magnetic transition at TC
Abstract
Ultrasonic attenuation and phase velocity measurements have been carried out in the ferromagnetic perovskites La2/3Ca1/3MnO3 and La2/3Sr1/3MnO3. Data show that the transition at the Curie temperature, TC, changes from first- to second-order as Sr replaces Ca in the perovskite. The compound with first-order transition shows also another transition at a temperature T* > TC. We interpret the temperature window TC < T < T* as a region of coexistence of a phase separated regime of metallic and insulating regions, in the line of recent theoretical proposals.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.