Research interests

• Solid State Physics
• Neutron Powder Diffraction
• Magnetic Structure Determination

• Magnetic structure in RFe₃(BO₃)₄ compounds, new Iron Arsenide SC's
• Structure and magnetism, phase transitions and phase segregations in GMR Manganates
• Structural and magnetic details, band filling effects in Double Perovskites
• Crystal and magnetic structure, phase transitions in Magnetocaloric Materials of type R₅Ge_4-xSi_x
• Magnetic structure of Laves Phases, intrinsic and induced moments in RMn₂
• Structure of and Motion in Hydrogen Intercalation Compounds, Chevrel Phases and Cu Spinel Phases

• "Structure and motion of hydrogen in molybdenum bronzes HxMoO3 as studied by nuclear magnetic resonance"
  C. Ritter, W. Mueller-Warmuth, R. Schoellhorn
  J. Chem. Phys. 83 (1985) 6130
  
  
• "Hydrogen Intercalation Compounds"
  C. Ritter
  Z. Phys. Chem. NF. 151 (1987) 51
  
  
• "Polarised neutron study of the magnetic ordering in the simple alloy YFe2"
  C. Ritter
  J. Phys. Condens. Matter 1 (1989) 2765
  
  
• "The magnetic structure of DyMn_2"
  C. Ritter, S.H. Kilcoyne, R. Cywinski
  J. Phys. : Condens. Matter 3 (1991) 727
  
  
• "Neutron Diffraction Study of the Crystal Structure of Lithium Intercalated Chevrel Phases"
  C. Ritter, E. Gocke, C. Fischer, R. Schoellhorn
  Mat. Res. Bull. 27 (1992) 1217
  
  
• "Neutron diffraction study of the structure of chalcogen spinels Cu_1+yCr₂X₄ (X=Se, Te)"
  A. Payer, R. Schoellhorn, C . Ritter, W. Paulus
  J. Alloys Comp. 191 (1993) 37
  
  
• "Intrinsic and induced Mn moments in Dy_1-xY_xMn_2"
  C. Ritter, R. Cywinski, S.H. Kilcoyne, S. Mondal, B.D. Rainford
  Phys. Rev. B 50 (1994) 9894
  
  
• "Spin-Glass Insulator State in (Tb-La)_2/3Ca_1/3MnO₃ Perovskite"
  J.M. De Teresa, M.R. Ibarra, J. Garcia, J. Blasco, C. Ritter, P.A. Algarabel, C. Marquina, A. Del Moral
  Phys. Rev. Lett. 76 (1996) 3392
  
  
• "A New Monoclinic Perovskite Allotype in Pr_0.6Sr_0.4MnO_3"
  C. Ritter, P.G. Radaelli, M.R. Lees, J. Barratt, G. Balakrishnan, D. McK. Paul
  J. Sol. St. Chem. 127 (1996) 276
  
  
• "Evidence for magnetic polarons in the magnetoresistive perovskites"
  J.M. De Teresa, M.R. Ibarra, P.A. Algarabel, C. Ritter, C. Marquina, J. Blasco, J. Garcia, A. Del Moral, Z. Arnold
  Nature 386 (1997) 256
  
  
• "Influence of oxygen content on the structural, magnetotransport, and magnetic properties of LaMnO^3+"
  C. Ritter, M.R. Ibarra, J.M. De Teresa, P.A. Algarabel, C. Marquina, J. Blasco, J. Garcia, S. Oseroff, S.-W. Cheong
  Phys. Rev. B 56 (1997) 8902
  
  
• "Magnetic structure of ¹⁵⁴SmMn₂Ge₂ as a function of temperature and pressure"
  G.J. Tomka, C. Ritter, P.C. Riedi, Cz. Kapusta, W. Kocemba
  Phys. Rev. B 58 (1998) 6330
  
  
• "Direct evidence of phase segregation and magnetic-field induced structural transition in Nd_0.5Sr_0.5MnO₃ by neutron diffraction"
  C. Ritter, R. Mahendiran, M.R. Ibarra, L. Morellon, A. Maignan, B. Raveau, C.N.R. Rao
  Phys. Rev. B 61 (2000) R9229
  
  
• "Structural and magnetic properties of double perovskites AA'FeMoO₆ (AA' = Ba₂, BaSr, Sr₂ and Ca₂)"
  C. Ritter, M.R. Ibarra, L. Morellon, J. Blasco, J. Garcia, J.M. De Teresa
  J. Phys. : Condens. Matter 12 (2000) 1
  
  
• "Structural and magnetic study of Tb1-xCaxMnO3 perovskites"
  J. Blasco, C. Ritter, J. Garcia, J.M. De Teresa, J. Perez-Cacho, M.R. Ibarra
  Phys. Rev. B 62 (2000) 5609
  
  
• "Magnetic and Structural phase diagram of Tb₅(Si_xGe_1-x)_4"
  C. Ritter, L. Morellon , P.A. Algarabel, C. Magen, M.R. Ibarra
  Phys. Rev. B 65 (2002) 094405
  
  
• "Magnetic and structural properties of the double-perovskite Ca₂FeReO_6"
  W. Westerburg, O. Lang, C. Ritter, C. Felser, W. Tremel, G. Jakob
  Sol. State Comm. 122 (2002) 201
  
  
• "Field effect on phase segregation in the electon-doped mixed-valence manganites near a structural instability"
  P.A. Algarabel, J.M. De Teresa, B. Garcia-Landa, L. Morellon, M.R. Ibarra, C. Ritter, R. Mahendiran, A. Maignan, M. Hervieu, C. Martin, B. Raveau, A. Kurbatov, V. Trunov
  Phys. Rev. B 65 (2002) 104437
  
  
• "Structural and magnetic details of 3d-element doped Sr₂Fe_0.75T_0.25MoO_6"
  C. Ritter, J. Blasco, J.-M. De Teresa, D. Serrate, L. Morellon, J. Garcia, M. R. Ibarra
  Solid St. Science 6 (2004) 419
  
  
• "Pressure Enhancement of the Giant Magnetocaloric Effect in Tb₅Si₂Ge₂"
  L. Morellon, Z. Arnold, C. Magen, C. Ritter, O. Prokhnenko, Y. Skorokhod, P. A. Algarabel, M. R. Ibarra, J. Kamarad
  Phys. Rev. Lett. 93 (2004) 137201
  
  
• "Investigation of the high Curie temperature in Sr₂CrReO_6"
  J.M. De Teresa, D. Serrate, C. Ritter, J. Blasco, M.R. Ibarra, L. Morellon, W. Tokarz
  Phys. Rev. B 71 (2005) 092408
  
  
• "Possible quantum critical point in La_2/3Ca_1/3Mn_1-xGa_xO_3"
  J.M. De Teresa, P.A. Algarabel, C. Ritter, J. Blasco, M.R. Ibarra, L. Morellon, J.I. Espeso, J.C. Gomez-Sal
  Phys. Rev. Lett. 94 (2005) 207205
  
  
• "Magnetic and crystal structures of Er₅(Si_xGe_1-x)_4"
  C. Ritter, C. Magen, L. Morellon, P.A. Algarabel, M.R. Ibarra, V.K. Pecharsky, A.O. Tsokol, K.A. Gschneidner Jr
  J. Phys.: Condens. Matter 18 (2006) 3937
  
  
• "Observation of a Griffiths-like Phase in the Magnetocaloric Compound Tb₅Si₂Ge_2"
  C. Magen, P.A. Algarabel, L. Morellon, J.P. Araujo, C. Ritter, M.R. Ibarra, A.M. Pereira, J.B. Sousa
  Phys. Rev. Lett. 96 (2006) 167201
  
  
• " Magnetic structure, magnetic interactions and metamagnetism in terbium iron borate TbFe3(BO3)4: a neutron diffraction and magnetization study",
  C. Ritter, A. Balaev, A. Vorotynov , G. Petrakovski, D. Velikanov, V. Temeraov, I. Gudim
  J. Phys.: Condens. Matter 19 (2007) 196227
  
  
• "Infinite-layer iron oxide with a square-planar coordination"
  Y. Tsujimoto, C. Tassel, N. Hayashi, T. Watanabe, H. Kageyama, K. Yoshimura, M. Takano, M. Ceretti, C. Ritter, W. Paulus
  Nature 450 (2007) 1062
  
  
•  "Magnetic structure in iron borates RFe3(BO3)4 (R = Y, Ho) : a neutron diffraction and magnetization study"
  C. Ritter, A. Vorotynov, A. Pankrats, G. Petrakowski, V. Temerov, I. Gudim, R. Szymczak
  J. Phys. : Condens. Matter 20 (2008) 365209
  
  
•  "Magnetic and crystal structure of Ho5(SixGe1-x)4 studied by neutron diffraction"
  C. Ritter, C. Magen, L. Mrellon, P.A. Algarabel, M.R. Ibarra, A.M. Pereira, J.P. Araujo, J.B. Sousa
  Phys. Rev. B 80 (2009) 104427
  
  
• "Coexistence of long-range magnetic order and superconductivity in the pnictide superconductor SmFeAsO1-xFx (x=0, 0.15)"
  D.H. Ryan, J.M. Cadogan, C. Ritter, F. Canepa, A. Palenzona, M. Putti
  Phys. Rev. B 80 220503 (R)
  
  
• "Phase diagram of NdFeAsO1-xFx: Essential role of chemical composition"
  L. Malavasi, G.A. Artioli, C. Ritter, M.C. Mozzati, B. Maroni, B. Pahari, A. Caneschi
  JACS 132 (2010) 2417