Juan Rodríguez-Carvajal

Specialisation

• Condensed Matter Physics and Crystallography
• Powder and single crystal x-rays and neutron scattering
• Symmetry analysis, crystallography and magnetism
• Oxides presenting remarkable properties: superconductivity, giant magnetoresistance, charge, spin & orbital ordering
• Computer programming and data analysis
• Neutron diffraction instrumentation

Current scientific interests

• Data analysis and software development in Crystallography and Diffraction Physics.
• Theoretical analysis of magnetic Structures. Frustration and low dimensional magnetism.
• Physics of Transition Metal-Rare Earth and Superconducting oxides and intermetallics.
  • Metal-Insulator Transitions and Magnetic Ordering in nickel and copper oxides.
  • Magnetic structures of Rare Earth Intermetallics.
  • Structural and magnetic aspects of oxides presenting colossal magnetoresistance and charge, spin and orbital ordering phenomena.

The 10 most cited papers (27 July 2006)

• "Recent Advances in Magnetic Structure Determination by Neutron Powder Diffraction" Juan Rodríguez-Carvajal, Physica B 192, 55-69 (1993)
  1511 (1471+40) citations
• "Neutron Diffraction Study of the Jahn-Teller Transition in Stoichiometric LaMnO3" J. Rodríguez-Carvajal, M. Hennion, F. Moussa, A.H. Moudden, L. Pinsard and A. Revcolevschi Physical Review B 57, Rapid Communications, R3189-R3192 (1998)
  217 (118+99) citations
• "Neutron Diffraction Study on Structural and Magnetic Properties of La₂NiO₄" J. Rodríguez-Carvajal, M.T. Fernández-Díaz and J.L. Martínez. Journal of Physics: Condensed Matter 3, 3215-3234 (1991)
  207 (199+8) citations
• "Neutron Diffraction Study of RNiO₃ (R=La, Pr, Nd, Sm). Electronically Induced Structural Changes Across the Metal-Insulator Transition" J.L. García-Muñoz, J. Rodríguez-Carvajal, P. Lacorre and J.B. Torrance. Physical Review B 46(8), 4414-4425 (1992)
  183 citations
• "Spin waves in the antiferromagnet perovskite LaMnO₃: a neutron scattering study" F. Moussa, M. Hennion, J.Rodríguez-Carvajal, L. Pinsard and A. Revcolevschi Physical Review B 54 (21), 15149-15155 (1996)
  163 citations
• "Liquid like Spatial Distribution of Magnetic Droplets Revealed by Neutron Scattering in La_1-xCa_xMnO₃." M. Hennion, F.Moussa, G. Biotteau, J.Rodríguez-Carvajal, L. Pinsard and A. Revcolevschi Physical Review Letters 81, 1957-1960 (1998).
  151 citations
• "Magnetic Frustration and Lattice Dimensionality in SrCr₈Ga₄O₁₉" X. Obradors, A. Labarta, A. Isalgué, J. Tejada, J. Rodríguez and M. Pernet. Solid State Communications 65(3), 189-192 (1988)
  115 citations
• "Electronic Crystallization in a Lithium Battery Material: Columnar Ordering of Electrons and Holes in the Spinel LiMn₂O₄." J. Rodríguez-Carvajal, G. Rousse, C. Masquelier and M. Hervieu. Physical Review Letters 81, 4660-4663 (1998).
  100 (97+3) citations
• "WinPLOTR: A Windows tool for powder diffraction pattern analysis." T. Roisnel and J.Rodríguez-Carvajal, Materials Science Forum 378-3, 118-123 (2001).
  98 citations
• "Anomalous Structural Behaviour of Stoichiometric La₂NiO₄" J. Rodríguez-Carvajal, J. L. Martínez, J. Pannetier and R. Saez-Puche, Physical Review B 38 (10), Rapid Communications, 7148-7151 (1988)
  82 (80+2) citations
• FullProf Citations: more than 3690 citations
  The use of FullProf is cited in different ways. Some people (mostly those working with magnetic structures) cite directly the paper Physica B 192, 55-69 (1993) (with 1511 citations), other people just cite the name of the program, the version, the manual, etc (around 990 citations ) and other makes reference to the communication: "FULLPROF: A Program for Rietveld Refinement and Pattern Matching Analysis", by J. Rodríguez-Carvajal, at the Satellite Meeting on Powder Diffraction of the XV IUCr Congress, 127 (1990) (around 1190 citations).

Selected representative publications from 1998

1. "Neutron Diffraction Study of the Magnetic and Orbital Ordering in ¹⁵⁴SmNiO₃ and ¹⁵³EuNiO₃". Physical Review B 57, 456 (1998)
2. "Neutron Diffraction Study of the Jahn-Teller Transition in Stoichiometric LaMnO₃". Physical Review B 57, Rapid Communications, R3189 (1998)
3. "Liquid-like Spatial Distribution of Magnetic Droplets Revealed by Neutron Scattering in La_1-xCa_xMnO₃". Physical Review Letters 81, 1957 (1998)
4. "Electronic Crystallization in a Lithium Battery Material: Columnar Ordering of Electrons and Holes in the Spinel LiMn₂O₄". Physical Review Letters 81, 4660 (1998).
5. "Magnetic Ordering of ErFe₄Ge₂ Studied By Neutron Diffraction and Magnetic Measurements". Journal of Magnetism and Magnetic Materials 191, 261 (1999).
6. "Cubic <---> Orthorhombic Transition in the Stoichiometric Spinel LiMn₂O₄". Solid State and Electrochemical Letters 2, 6 (1999).
7. "Magnetic Coupling Induced by Hole Doping in Perovskites La_1-xCa_xMnO₃: A Neutron Scattering Study". Physical Review B 60, 12299 (1999).
8. "Infrared spectroscopy investigation of the charge ordering transition in LiMn₂O₄". Solid State Communications 111, 453 (1999)
9. "X-Ray study of the spinel LiMn₂O₄ at low temperatures". Chemistry of Materials 11, 3629 (1999).
10. "A powder neutron diffraction investigation of the two rhombohedral NASICON analogs: g-Na₃Fe₂(PO₄)₃ and Li₃Fe₂(PO₄)₃". Chemistry of Materials 12, 525 (2000)
11. "The Double Phase Transition on ErFe₄Ge₂. An XRPD Study". Journal of Magnetism and Magnetic Materials 210, 121 (2000)
12. "Evidence of Anisotropic Magnetic Polarons in La_0.94Sr_0.06MnO₃ by neutron scattering and comparison with Ca-doped Manganites". Physical Review B 61, 9513 (2000)
13. "Structure and Thermal Expansion of the Low Temperature Phase of SF₆". Low Temperature Physics 26, 296 (2000)
14. "Dependence of the Physical Properties of Nd_0.5Ca_0.5MnO_3+d on the Oxidation State of Mn". Physical Review B 62, 3002 (2000)
15. "Simultaneous structural and magnetic transitions in YFe₄Ge₂ studied by neutron diffraction and magnetic measurements". Journal of Magnetism and Magnetic Materials 236, 14 (2001)
16. "Crystal and magnetic structure of orthorhombic HoMnO₃". Physical Review B 63, 094411 (2001)
17. "Stability of the Janh-Teller effect and magnetic study of LaMnO₃ under pressure". Physical Review B 64, 064426 (2001)
18. "Approach to the metal-insulator transition in La_1-xCa_xMnO₃ (0 < x < 0.2): Magnetic inhomogeneity and spin-wave anomaly". Physical Review B 64, 104421 (2001)
19. "Crystal and magnetic structures of the oxyphosphates MFePO₅ (M = Fe, Co, Ni, Cu). Analysis of the magnetic ground state in terms of superexchange interactions". The European Physical Journal B 22, 429 (2001)
20. "Neutron diffraction study of the magnetic ordering in the series R₂BaNiO₅ (R=Rare Earth)". The European Physical Journal B 24, 59 (2001)
21. "Magnetic Structural Studies of the Two Polymorphs of Li₃Fe₂(PO₄)₃: Analysis of the Magnetic Ground State from Super-Super Exchange Interactions". Chemistry of Materials 13, 4527 (2001)
22. "Magnetic structure determination from powder diffraction. Symmetry analysis and simulated annealing". Materials Science Forum 378-381, 268 (2001)
23. "A neutron diffraction study of the antiferromagnetic diphosphate LiFeP₂O₇". Solid State Sciences 4, 973 (2002)
24. "A new interpretation of the CO state in half-doped manganites: new results from neutron diffraction and synchrotron radiation experiments". Physica B 320, 1 (2002)
25. "Zener Polaron Ordering in Half-Doped Manganites". Physical Review Letters 89, 097205 (2002)
26. "Re-entrant magneto-elastic transition in HoFe₄Ge₂: an XRPD study". Journal of Magnetism and Magnetic Materials 250, 225 (2002)
27. "Magnetic Structures of the Triphylite LiFePO₄ and of its Delithiated Form FePO₄". Chemistry of Materials 15(21), 4082 (2003)
28. "FullProf as a new tool for flipping ratio analysis". Physica B: Condensed Matter 335, 219 (2003)
29. "Magnetic Properties of Paramelaconite (Cu₄O₃). A pyrochlore lattice with S=1/2". Physical Review B 69, 104408 (2004)
30. "Direct Determination of the Magnetic Ground State in the Square Lattice S=1/2 Antiferromagnet Li₂VOSiO₄". Physical Review Letters 93, 027202 (2004)
31. "Direct localization of atoms in mixed-occupancy powders by resonant contrast diffraction" Angewandte Chemie-International Edition 44, 1725 (2005)
32. "Ordered spin ice state and magnetic fluctuations in Tb₂Sn₂O₇". Physical Review Letters 94, 246402 (2005)
33. "Paramagnetic fluctuations in Pr_0.65Ca_0.35MnO₃ around the charge-ordering temperature". Journal of Physics: Condensed Matter 18(5), 1509 (2006)
34. "Synchrotron and neutron diffraction study of 4-methylpyridine-N-oxide at low temperature". Acta Crystallographica B 62, 627 (2006)

More Information

• Summarised CV (27 July 2006)
• Complete list of publications