Zone center phonons of the orthorhombic RMnO3(R = Pr, Eu, Tb, Dy, Ho) perovskites

2008/03/17 by Hem Chandra Gupta, HC Gupta, Upendra Tripathi · 3 citations
Materials Science · Physics and Astronomy · #Constant (computer programming) #Force constant #Infrared #Magnetic and transport properties of perovskites and related materials #Multiferroics and related materials #Orthorhombic crystal system #Phonon #Raman spectroscopy #Range (aeronautics) #Thermal Expansion and Ionic Conductivity #physics.atm-clus

paper · pdf · doi:10.1186/1754-0429-1-9

published in PMC Physics B 1(1) · 8 pages, 1 figure

openalex publication_date 2008/03/17 · arxiv created 2008/05/12 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

A short range force constant model (SRFCM) has been applied for the first time to investigate the phonons in RMnO 3 (R = Pr, Eu, Tb, Dy, Ho) perovskites in their orthorhombic phase. The calculations with 17 stretching and bending force constants provide good agreement for the observed Raman frequencies. The infrared frequencies have been assigned for the first time. PACS Codes: 36.20.Ng, 33.20.Fb, 34.20.Cf

Citations

• Giant negative magnetoresistance in perovskitelikeLa2/3Ba1/3MnOxferromagnetic films
• Distorted perovskite witheg1configuration as a frustrated spin system
• Raman phonons as a probe of disorder, fluctuations, and local structure in doped and undoped orthorhombic and rhombohedral manganites
• Thousandfold Change in Resistivity in Magnetoresistive La-Ca-Mn-O Films