2008/05/05 by Hena Das, Umesh V. Waghmare, Tanusri Saha‐Dasgupta +2
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anomaly (physics) #Condensed matter physics #Dielectric #Ferromagnetism #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #Physics #Quantum mechanics #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevlett.100.186402
published as PRL 100,186402 (2008) · 4 pages,3 figures
openalex publication_date 2008/05/05 · arxiv created 2008/05/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Using first-principles density functional calculations, we study the electronic and magnetic properties of the ferromagnetic insulating double perovskite compound La2NiMnO6, which has been reported to exhibit an interesting magnetic field sensitive dielectric anomaly as a function of temperature. Our study reveals the existence of very soft infrared active phonons that couple strongly with spins at the Ni and Mn sites through modification of the superexchange interaction. We suggest that these modes are the origin for the observed dielectric anomaly in La2NiMnO6.