Raman scattering study of Nd1−xSrxMnO3 (x = 0.3, 0.5)

  title={Raman scattering study of Nd1−xSrxMnO3 (x = 0.3, 0.5)},
  author={K Y Choi and Peter Lemmens and G. Gu ̈ ntherodt and M. Pattabiraman and Goutham Rangarajan and Vladimir Gnezdilov and Geetha Balakrishnan and Don Mck. Paul and Martin Richard Lees},
  journal={Journal of Physics: Condensed Matter},
We report on polarized Raman scattering of single crystals of Nd1−xSrxMnO3 (x = 0.3, 0.5). Raman spectra of Nd0.7Sr0.3MnO3 show a significant change through the metal–insulator transition. In the ferromagnetic metallic phase phonon modes grow in intensity and number while the electronic continuum becomes more pronounced. We suggest that these effects are due to the strong competition between the localization and the delocalization of carriers which is the origin of the largest colossal… 
27 Citations
Electronic and vibrational Raman spectroscopy of Nd0.5Sr0.5MnO3 through the phase transitions
Raman scattering experiments have been carried out on single crystals of Nd0.5Sr0.5MnO3 as a function of temperature in the range of 320–50 K, covering the paramagnetic insulator-ferromagnetic metal
Observation of charge ordering by Raman scattering in Nd0.5Ca0.5MnO3 thin films
We report on the first observation by Raman scattering of charge ordering in thin films of Nd0.5Ca0.5MnO3. We observe the emergence of additional phonon excitations at low temperature that confirms
Optical Study of the Electronic Structure and Lattice Dynamics of NdBaMn2O6 Single Crystals
Findings highlight the importance of charge–orbital–spin interactions in establishing NdBaMn2O6 phases with novel properties and reveal the strong coupling between the lattice and magnetic degrees of freedom.
Spin-phonon coupling in HoCr1 − x Fe x O3 (x = 0 and 0.5) compounds
We report on the temperature dependent Raman scattering studies of polycrystalline HoCr1-xFexO3 (x=0 and 0.5) compounds. No signature of phonon mode related to structural phase transition is evident
Optical Studies on the Phase Transitions in YBaMn2O6 Single Crystals
Investigation of the correlation between the temperature-dependent optical response and complex phase transitions of YBaMn2O6 single crystals through spectroscopic ellipsometry and Raman scattering spectroscopy found anomalies in the phonon frequency, line width, and intensity observed near the phase transition temperatures highlighted the importance of lattice–charge–spin interactions.
Micro-Raman study and phase transitions of Nd0.5Ca0.5MnO3
A micro-Raman study of high quality Nd0.5Ca0.5MnO3 single crystals is presented, with temperature variation. Twelve Ag and eight B2g Raman active modes (simplified symmetry: Pmma space group) have
Resonant micro-Raman study of Nd0.5Sr0.5MnO3
We present a resonant micro-Raman study of a high-quality Nd0.5Sr0.5MnO3 single crystal as a function of temperature. The detected phonons trace the evolution between the paramagnetic, ferromagnetic,
Structural, magnetic, infrared and Raman studies of La0.8SrxCa0.2-xMnO3 (0 ≤ x ≤ 0.2)
We report the results of magnetic, X-ray powder diffraction, infrared and temperature dependent Raman spectra of the La0.8SrxCa0.2-xMnO3 (0 ≤ x ≤ 0.2) manganite. The structure refinement using the
Study on structure, electrical and dielectric properties of Eu0.65Sr0.35Fe0.3Mn0.7O3
Polycrystalline Eu0.65Sr0.35Fe0.3Mna7O3 was synthesized using a standard solid state reaction technique. The preliminary microstructure of this compound at room temperature was studied using a field


Raman spectroscopy of orthorhombic La1-xCaxMnO3, x = 0.1-0.3
This paper reports polarization-resolved temperature-dependent Raman scattering measurements on single crystals of the orthorhombic perovskite colossal-magnetoresistive material La1-xCaxMnO3, with x
Probing anisotropic magnetotransport in manganese perovskites using Raman spectroscopy
We report an electronic Raman scattering study of the colossal magnetoresistance (CMR) manganese perovskites as a function of temperature, magnetic field, symmetry, and doping. The low-frequency
Anisotropic CE-type orbital correlations in the ferromagnetic metallic phase of Nd1/2Sr1/2MnO3
We present hard x-ray scattering studies of the charge and orbital ordering in Nd 1 / 2 Sr 1 / 2 MnO 3 together with magnetization and thermal expansion measurements as a function of temperature and
Raman spectroscopy of the charge- and orbital-ordered state in La 0.5 Ca 0.5 MnO 3
Polarized Raman spectra from microcrystals of La{sub 0.5}Ca{sub 0.5}MnO{sub 3} were studied as a function of temperature, excitation photon energy, and scattering configuration. At temperatures below
Raman spectroscopy of orthorhombic perovskitelike YMnO_{3} and LaMnO_{3}
The Raman-active phonons in orthorhombic perovskitelike YMnO3 and LaMnO3 were studied by measuring Raman spectra in various scattering configurations. The experimental Raman line wave numbers and the
Nanoscale anisotropic structural correlations in the paramagnetic and ferromagnetic phases of Nd 0.5 Sr 0.5 MnO 3
We report x-ray scattering studies of short-range structural correlations and diffuse scattering in Nd{sub 0.5}Sr{sub 0.5}MnO{sub 3}. On cooling, this material undergoes a series of transitions,
We report synchrotron x-ray scattering studies of charge/orbitally ordered (COO) nanoclusters in Nd$_{0.7}$Sr$_{0.3}$MnO$_3$. We find that the COO nanoclusters are strongly suppressed in an applied
Giant magnetoresistance in epitaxial Nd0.7Sr0.3MnO3−δ thin films
The magnetoresistance of epitaxial Nd0.7Sr0.3MnOδ thin films has been studied. A giant magnetoresistance, with more than 4 orders of magnitude change in resistance (−ΔR/RH≳106%), was obtained at ∼60
Lattice and charge excitations in La 1-x Sr x MnO 3
We employ inelastic Light scattering to study the dependence of the lattice and charge excitations in La1-xSrxMnO3 compounds on doping and temperature. The phonons reveal strong local lattice