Publications (69)
Measurement of anharmonicity of phonons in negative thermal expansion compound Zn(CN)2 by high pressure inelastic neutron scattering
R. Mittal, S. L . Chaplot, H. Schober
Effect of Hydration and Ammonization on the Thermal Expansion Behaviour of ZrW2O8: Ab-initio Lattice Dynamical Perspective
M. K. Gupta, R. Mittal, Baltej Singh +1
Lattice vibrations in high-pressure phases of LiYF$_{4}$
A. Sen, S. L. Chaplot, R. Mittal
Phonons and Anomalous Thermal Expansion Behaviour in Crystalline Solids
R. Mittal, M. K. Gupta, S. L. Chaplot
High-Temperature Phonon Spectra of Multiferroic BiFeO3 from Inelastic Neutron Spectroscopy
M. Zbiri, H. Schober, N. Choudhury +5
Pressure dependence of the low- temperature crystal structure and phase transition behaviour of CaFeAsF and SrFeAsF: A synchrotron x-ray diffraction study
S. K. Mishra, R. Mittal, S. L. Chaplot +8
Lattice Dynamics and Thermal Expansion Behavior in Metal Cyanides, MCN (M=Cu, Ag, Au): Neutron Inelastic Scattering and First Principles Calculations
M. K. Gupta, Baltej Singh, R. Mittal +2
Phonons, Nature of Bonding and Their Relation to Anomalous Thermal Expansion Behavior of M2O (M=Au, Ag, Cu)
M. K. Gupta, R. Mittal, S. L. Chaplot +1
Magnetic structure and orbital ordering in KCrF3 perovskite
Y. Xiao, Y. Su, H. -F. Li +6
Phonons and Anomalous Thermal Expansion Behaviour of H2O and D2O ice Ih
M. K. Gupta, R. Mittal, Baltej Singh +4
Field induced spin reorientation and giant spin-lattice coupling in EuFe2As2
Y. Xiao, Y. Su, W. Schmidt +11
Neutron diffraction on antiferromagnetic ordering in single-crystal BaFe2As2
Y. Su, P. Link, A. Schneidewind +9
Strong coupling of Sm and Fe magnetism in SmFeAsO as revealed by magnetic x-ray scattering
S. Nandi, Y. Su, Y. Xiao +17
Magnetic structure of EuFe2As2 determined by single crystal neutron diffraction
Y. Xiao, Y. Su, M. Meven +9
Spin-Phonon Coupling and High Pressure Phase Transitions of RMnO3 (R= Ca and Pr): An Inelastic Neutron Scattering and First Principle Studies
S. K. Mishra, M. K. Gupta, R. Mittal +2
Lattice dynamical calculations of infinite layer iron oxides SrFeO2 and CaFeO2
R. Mittal, S. L. Chaplot, Y. Su
Evidence for existence of Functional Monoclinic Phase in Sodium Niobate based Solid Solution by Powder Neutron Diffraction
S. K. Mishra, Mrinal Jauhari, R. Mittal +3
Phonons and Stability of Infinite-Layer Iron Oxides SrFeO2 and CaFeO2
M. K. Gupta, R. Mittal, S. L. Chaplot +2
Inelastic Neutron Scattering Studies of Phonon Spectra and Simulations in Tungstates, AWO4 (A = Ba, Sr, Ca and Pb)
Prabhatasree Goel, M. K. Gupta, R. Mittal +4
Cold gas dynamics in Hydra-A: evidence for a rotating disk
S. L. Hamer, A. C. Edge, A. M. Swinbank +15
Competing antiferroelectric and ferroelectric interactions in NaNbO3 : Neutron diffraction and theoretical studies
S. K. Mishra, N. Choudhury, S. L. Chaplot +2
Diffuse Neutron Scattering Study of Magnetic Correlations in half-doped La0.5Ca0.5-xSrxMnO3 (x = 0.1, 0.3 and 0.4) Manganites
I. Dhiman, A. Das, R. Mittal +3
Phase Stability of Multiferroic GaFeO3 up to 1368 K from In situ Neutron Diffraction
S. K. Mishra, R. Mittal, R. Singh +3
Inelastic X-ray Scattering Study of superconducting SmFeAs(O$_{1-x}$F$_{y}$) Single Crystals: Evidence for Strong Momentum-Dependent Doping-Induced Renormalizations of Optical Phonons
M. Le Tacon, T. R. Forrest, Ch. Rüegg +10
Phonons and Anisotropic Thermal Expansion Behaviour of NiX (X = S, Se, Te)
Prabhatasree Goel, M. K. Gupta, S. K. Mishra +5
Evidence for anomalous structural behavior in CaFe2As2
S. K. Mishra, R. Mittal, P. S. R. Krishna +5
Synchrotron X-ray Diffraction Study of BaFe2As2 and CaFe2As2 at High Pressures up to 56 GPa: Ambient and Low-Temperatures Down to 33 K
R. Mittal, S. K. Mishra, S. L. Chaplot +9
Inelastic neutron scattering and lattice dynamical calculations in BaFe2As2
R. Mittal, Y. Su, S. Rols +6
Phase stability and structural temperature dependence in sodium niobate: A high resolution powder neutron diffraction study
S. K. Mishra, R. Mittal, V. Yu. Pomjakushin +1
Spin-Lattice Coupling in K0.8Fe1.6Se2 and KFe2Se2: Inelastic Neutron Scattering and ab-initio Phonon Calculations
R. Mittal, M. K. Gupta, S. L. Chaplot +6
Vibrational and thermodynamic properties of high-pressure phases in LiYF_4
A. Sen, S. L. Chaplot, R. Mittal
ICM cooling, AGN feedback and BCG properties of galaxy groups-Five properties where groups differ from clusters
V. Bharadwaj, T. H. Reiprich, G. Schellenberger +3
Multiphase Signatures of AGN Feedback in Abell 2597
G. R. Tremblay, C. P. O'Dea, S. A. Baum +18
Neutron Diffraction Reveals the Existence of Confined Water in Triangular and Hexagonal Channels of Modified YPO4 at Elevated Temperatures
S. K. Mishra, R. S. Ningthoujam, R. Mittal +8
Spin-Phonon Coupling, High Pressure Phase Transitions and Thermal Expansion of Multiferroic GaFeO3: A Combined First Principles and Inelastic Neutron Scattering Study
M. K. Gupta, R. Mittal, M. Zbiri +4
Testing for Shock-Heated X-ray Gas Around Compact Steep Spectrum Radio Galaxies
C. P. O'Dea, D. M. Worrall, G. R. Tremblay +7
Magnetic correlations in spin ice Ho2-xYxTi2O7 as revealed by neutron polarization analysis
L. J. Chang, Y. Su, Y. -J. Kao +6
Dynamics of Li-ion in V2O5 Layers from First-Principles Calculations
Baltej Singh, M. K. Gupta, R. Mittal +1
Phonon Softening and Pressure-Induced Phase Transitions in Quartz Structured Compound, FePO4
R. Mittal, R. P. Hermann, M. Angst +5
Phonons and Thermodynamics of LiMPO4 (M=Mn, Fe)
Prabhatasree Goel, M. K. Gupta, R. Mittal +5
New Insights into the Compressibility and High-Pressure Stability of Ni(CN)2 from Neutron Diffraction, Raman Spectroscopy and Inelastic Neutron Scattering
S. K. Mishra, R. Mittal, M. Zbiri +7
Neutron diffraction study on phase transition and thermal expansion of SrFeAsF
Y. Xiao, Y. Su, R. Mittal +9
Effects of magnetic doping and temperature dependence on phonon dynamics in CaFe\_{1-x}Co\_{x}AsF compounds (x = 0, 0.06, 0.12)
R. Mittal, M. Zbiri, S. Rols +9
Phonons, Phase Transitions and Thermal Expansion in LiAlO2: An ab-initio Density Functional Study
Baltej Singh, M. K. Gupta, R. Mittal +1
Magnetisation distribution in the tetragonal phase of BaFe2As2
P. J. Brown, T. Chatterji, A. Stunault +6
Negative Thermal Expansion Behaviour in MZrF6 (M=Ca, Mg, Sr): Ab-initio Lattice Dynamical Studies
M. K. Gupta, Baltej Singh, R. Mittal +1
Herschel observations of FIR emission lines in brightest cluster galaxies
A. C. Edge, J. B. R. Oonk, R. Mittal +24
Investigating Anomalous Thermal Expansion of Copper Halides by Inelastic Neutron Scattering and Ab-inito Phonon Calculations
Abhijith M. Gopakumar, M. K. Gupta, R. Mittal +2
Phonon spectra in CaFe2As2 and Ca0.6Na0.4Fe2As2: Measurement of the pressure and temperature dependence and comparison with ab-initio and shell model calculations
R. Mittal, S. Rols, M. Zbiri +10
Lattice Dynamics and High Pressure Phase Stability of Zircon Structured Natural Silicates
Preyoshi P. Bose, R. Mittal, S. L. Chaplot
Phonon dynamics in Sr0.6K0.4Fe2As2 and Ca0.6Na0.4Fe2As2
R. Mittal, Y. Su, S. Rols +6
Herschel photometry of brightest cluster galaxies in cooling flow clusters
A. C. Edge, J. B. R. Oonk, R. Mittal +24
Anomalous Phonons in CaFe2As2
R. Mittal, L. Pintschovius, D. Lamago +9
Magnetic order in CaFe1-xCoxAsF (x = 0, 0.06, 0.12) superconductor compounds
Y. Xiao, Y. Su, R. Mittal +6
Negative Thermal Expansion in cubic ZrW2O8: Role of Phonons in Entire Brillouin Zone From ab-inito Calculations
M. K. Gupta, R. Mittal, S. L. Chaplot
Pressure dependence of phonon modes across the tetragonal to collapsed tetragonal phase transition in CaFe2As2
R. Mittal, R. Heid, A. Bosak +14
Deep and narrow CO absorption revealing molecular clouds in the Hydra-A brightest cluster galaxy
Tom Rose, A. C. Edge, F. Combes +20
Lithium Diffusion in Li2X(X=O, S and Se): Ab-initio Simulations and Neutron Inelastic Scattering Measurements
M. K. Gupta, Baltej Singh, Prabhatasree Goel +3
A VLBI Study of the Gravitational Lens JVAS B0218+357
R. Mittal, R. Porcas, O. Wucknitz +1
The duty cycle of radio-mode feedback in complete samples of clusters
L. Bîrzan, D. A. Rafferty, P. E. J. Nulsen +4
Phonon Dispersion Relation, High-Pressure Phase Stability and Thermal Expansion in YVO4
R. Mittal, M. K. Gupta, Baltej Singh +3
High Temperature Phase Stability in Li0.12Na0.88NbO3: A Combined powder X-Ray and Neutron Diffraction Study
S. K. Mishra, P. S. R. Krishna, A. B. Shinde +4
Suppression of Antiferroelectric State in NaNbO3 at High Pressure from In Situ Neutron Diffraction
S. K. Mishra, M. K. Gupta, R. Mittal +2
An embedded active nucleus in the OH megamaser galaxy IRAS16399-0937
Dinalva A. Sales, A. Robinson, D. J. Axon +7
Phonon Dynamics and Inelastic Neutron Scattering of Sodium Niobate
S. K. Mishra, M. K. Gupta, R. Mittal +4
Dynamic Disorder in Negative Thermal Expansion Compound Zn(CN)2
R. Mittal, S. Mitra, H. Schober +2
Residual Cooling and Persistent Star Formation amid AGN Feedback in Abell 2597
G. R. Tremblay, C. P. O'Dea, S. A. Baum +18
Behavior of Lithium Oxide at Superionic Transition: First Principles and Molecular Dynamics Studies
M. K. Gupta, Prabhatasree Goel, R. Mittal +2
Ab initio lattice dynamics simulations and inelastic neutron scattering spectra for studying phonons in BaFe2As2: Effect of structural phase transition, structural relaxation and magnetic ordering
M. Zbiri, H. Schober, M. R. Johnson +5