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Dr. Trinath Mishra back |
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The syntheses, structural investigation, magnetic properties and hydrogenation behaviour of intermetallic RETX compounds (RE= rare Earth transition metal, T=late transition metal, X=element of the 3rd, 4th, or 5th main group) are in the central focus of the present research project. Among the rare earths Ce, Eu and Yb which exhibit variable valence behaviour will be mainly focused. In the compounds, rare earth metals being electropositive in nature exhibit different electronic and intermediate valence states and giving rise to highly interesting magnetic and electrical properties - Kondo or heavy fermion behavior, antiferromagnetic or ferromagnetic ordering, strong crystal field splitting, or superconductivity etc. In order to obtain a comprehensive insight of structural features, Mössbauer spectroscopy, solid state NMR techniques are performed parallel to X-ray powder and single crystal X-ray diffraction. The magnetic properties are measured with PPMS. The structural and magnetic properties of the RETX compounds can be changed through application of high pressure or via hydrogenation. Another goal of this study is to search for new hydrogen storage materials. The hydrogen absorption experiments will be performed in collaboration with Dr. B. Chevalier (ICMCB-CNRS, Bordeaux). Publications R.-D. Hoffmann, T. Mishra, B. Heying, U. C. Rodewald, S. F. Matar, H. Deters, H. Eckert, R. Pöttgen ScPdZn and ScPtZn with YAlGe Type Structure – Group-Subgroup Relation and 45Sc Solid State NMR Spectroscopy Z. Anorg. Allg. Chem. 638 (2012), 1–9. T. Mishra, G. Heymann, H. Huppertz, R. Pöttgen Dimorphism in the REPdZn series Intermetallics 20 (2012), 110-114. T. Mishra, C. Schwickert, R. Pöttgen La3Pd4Zn4 and La3Pt4Zn4 with a different coloring of the Gd3Cu4Ge4-type structure Monatsh Chem 142 (2011), 973–978. T. Mishra, R.-D. Hoffmann, C. Schwickert, R. Pöttgen Structure Refinement and Magnetic Properties of Ce2RuAl3 and a Group-Subgroup Scheme for Ce5Ru3Al2 Z. Naturforsch. 66b (2011), 771–776. T. Mishra, C. Schwickert, T. Langer, R. Pöttgen Ternary Stannides RE3Ru4Sn13 (RE = La, Ce, Pr, Nd) – Structure, Magnetic Properties, and 119Sn Mössbauer Spectroscopy Z. Naturforsch. 66b (2011), 664–670. T. Mishra, R. Pöttgen Intermetallic REPtZn Compounds with TiNiSi-type Structure Z. Naturforsch. 66b (2011), 671–676. T. Mishra, R. Pöttgen Structure and homogeneity ranges of the REAuZn series Intermetallics 19 (2011), 947-951. T. Mishra, I. Schellenberg, M. Eul, R. Pöttgen Structure and properties of EuTSb (T = Cu, Pd, Ag, Pt, Au) and YbIrSb Z. Kristallogr. 226 (2011). T. Mishra, M. Eul, S. F. Matar, R. Pöttgen Complex Borides RERu4B4 (RE = Ce, Pr, Nd, Sm) – Bonding Peculiarities and Magnetic Properties Z. Anorg. Allg. Chem. 636 (2010). T. Mishra, W. Hermes, T. Harmening, M. Eul, R. Pöttgen EuTZn (T= Pd, Pt,Au)with TiNiSi-type structure — Magnetic properties and 151Eu Mössbauer spectroscopy Journal of Solid State Chemistry 182 (2009), 2417–2422. Trinath Mishra eMail: Trinath Mishra |
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