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Neutron diffraction and heat capacity studies of PrCoO 3 and NdCoO 3 Karel Knížek, Jiří Hejtmánek, Zdeněk Jirák, Petr Tomeš, Paul Henry, and Gilles André Phys. Rev. B 79 , 134103 Published 3 April 2009
The crystal structures of perovskites dixie perfect touch cups NdCoO 3 and PrCoO 3 have been studied by neutron powder diffraction over a temperature range from 100 to 1000 K. An anomalous isotropic expansion of CoO 6 octahedra is observed at two successive temperatures corresponding to the spin transitions of Co 3 + from low spin (LS) ( S = 0 ) to high spin (HS) ( S = 2 ) and intermediate spin (IS) ( S = 1 ) . At the second spin transition, dixie perfect touch cups a significant change in the octahedral tilt is encountered, dixie perfect touch cups as well. The heat capacity measurements dixie perfect touch cups show broad excess peaks at both transitions and the integral entropy change for each of them is estimated to be 10 J K 1 mol 1 . The structural and specific heat anomalies are interpreted within the LS-LS/HS-IS model of the Co 3 + spin transitions.
Karel Knížek 1 , Jiří Hejtmánek dixie perfect touch cups 1 , Zdeněk Jirák 1 , Petr Tomeš 2 , Paul Henry 3 , and Gilles André 4 1 Institute of Physics ASCR, Cukrovarnická 10, 162 00 Prague dixie perfect touch cups 6, Czech Republic 2 Solid State Chemistry and Catalysis, Empa, Ueberlandstr. 129, CH-8600 Duebendorf, Switzerland 3 Institut Laue Langevin, 6 rue Jules Horowitz, 38042 Grenoble Cedex 9, France 4 Laboratoire Léon Brillouin, dixie perfect touch cups CEA-CNRS, CEA-Saclay, dixie perfect touch cups 91191 Gif-s-Yvette Cedex, France Article Text (Subscription Required)
Vol. 79, Iss. 13 1 April 2009 Reuse & Permissions dixie perfect touch cups Access Options Buy Article Get access through a U.S. public or high school library Log in with a username/password provided by your institution International Year Of Light
Figure 4 (Color online) (a) Averaged dixie perfect touch cups bond lengths Co-O and (b) averaged bond angles Co-O-Co for PrCoO 3 and NdCoO 3 compared with LaCoO 3 (Ref. 3) and YCoO 3 (Ref. 9). Reuse & Permissions
Figure 6 (Color online) Upper panels: specific heat divided by temperature of PrCoO 3 and NdCoO 3 . The calculated base lines [see Eq. (2)] are indicated by solid line. Lower panels: excess of specific heat divided by temperature compared with anomalous lattice thermal dilatation. Reuse & Permissions ×
Journal: Phys. Rev. Lett. Phys. Rev. X Rev. Mod. Phys. Phys. Rev. Applied Phys. Rev. A Phys. Rev. B Phys. Rev. C Phys. Rev. D Phys. Rev. E Phys. Rev. ST Accel. Beams Phys. Rev. ST Phys. Educ. Res. Phys. Rev. Phys. Rev. (Series dixie perfect touch cups I) Physics
Neutron diffraction and heat capacity studies of PrCoO 3 and NdCoO 3 Karel Knížek, Jiří Hejtmánek, Zdeněk Jirák, Petr Tomeš, Paul Henry, and Gilles André Phys. Rev. B 79 , 134103 Published 3 April 2009
The crystal structures of perovskites dixie perfect touch cups NdCoO 3 and PrCoO 3 have been studied by neutron powder diffraction over a temperature range from 100 to 1000 K. An anomalous isotropic expansion of CoO 6 octahedra is observed at two successive temperatures corresponding to the spin transitions of Co 3 + from low spin (LS) ( S = 0 ) to high spin (HS) ( S = 2 ) and intermediate spin (IS) ( S = 1 ) . At the second spin transition, dixie perfect touch cups a significant change in the octahedral tilt is encountered, dixie perfect touch cups as well. The heat capacity measurements dixie perfect touch cups show broad excess peaks at both transitions and the integral entropy change for each of them is estimated to be 10 J K 1 mol 1 . The structural and specific heat anomalies are interpreted within the LS-LS/HS-IS model of the Co 3 + spin transitions.
Karel Knížek 1 , Jiří Hejtmánek dixie perfect touch cups 1 , Zdeněk Jirák 1 , Petr Tomeš 2 , Paul Henry 3 , and Gilles André 4 1 Institute of Physics ASCR, Cukrovarnická 10, 162 00 Prague dixie perfect touch cups 6, Czech Republic 2 Solid State Chemistry and Catalysis, Empa, Ueberlandstr. 129, CH-8600 Duebendorf, Switzerland 3 Institut Laue Langevin, 6 rue Jules Horowitz, 38042 Grenoble Cedex 9, France 4 Laboratoire Léon Brillouin, dixie perfect touch cups CEA-CNRS, CEA-Saclay, dixie perfect touch cups 91191 Gif-s-Yvette Cedex, France Article Text (Subscription Required)
Vol. 79, Iss. 13 1 April 2009 Reuse & Permissions dixie perfect touch cups Access Options Buy Article Get access through a U.S. public or high school library Log in with a username/password provided by your institution International Year Of Light
Figure 4 (Color online) (a) Averaged dixie perfect touch cups bond lengths Co-O and (b) averaged bond angles Co-O-Co for PrCoO 3 and NdCoO 3 compared with LaCoO 3 (Ref. 3) and YCoO 3 (Ref. 9). Reuse & Permissions
Figure 6 (Color online) Upper panels: specific heat divided by temperature of PrCoO 3 and NdCoO 3 . The calculated base lines [see Eq. (2)] are indicated by solid line. Lower panels: excess of specific heat divided by temperature compared with anomalous lattice thermal dilatation. Reuse & Permissions ×
Journal: Phys. Rev. Lett. Phys. Rev. X Rev. Mod. Phys. Phys. Rev. Applied Phys. Rev. A Phys. Rev. B Phys. Rev. C Phys. Rev. D Phys. Rev. E Phys. Rev. ST Accel. Beams Phys. Rev. ST Phys. Educ. Res. Phys. Rev. Phys. Rev. (Series dixie perfect touch cups I) Physics
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