Crystal and Magnetic Structure of PrCaCrO4

• Published in: Journal of solid state chemistry Vol. 142; no. 1; pp. 29 - 32
• Main Authors: Romero de Paz, J., Fernández-Dı́az, M.T., Hernández Velasco, J., Sáez Puche, R., Martı́nez, J.L.
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01-01-1999; Elsevier
• Subjects: Antiferromagnetism; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Inorganic compounds; Magnetic properties and materials; magnetic structure; Magnetically ordered materials: other intrinsic properties; neutron powder diffraction; Physics; Salts; Saturation moments and magnetic susceptibilities; Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.); Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Antiferromagnetism; magnetic structure; neutron powder diffraction; Inorganic compounds; Neutron diffraction; Transition element compounds; Magnetic moments; Praseodymium compounds; Calcium compounds; Rare earth compounds; Experimental study; Chromates; High-resolution methods; Magnetic susceptibility; Neel temperature; Magnetic structure; Quaternary compounds; Crystal structure
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1006/jssc.1998.7973

The crystal and magnetic structures of PrCaCrO4have been characterized by high-resolution neutron diffraction. The structure is described as orthorhombic with space groupBmaband lattice parametersa=5.3909(3) Å,b=5.3999(3) Å , andc= 11.9932(5) Å at 200 K. The antiferromagnetic ordering in the Cr3+sublattice is explained on the basis of a propagation vector k=0 and a collinear structure, described within a symmetry modeGxand a magnetic moment of 2.38(9)μBat 1.5 K. The Néel temperature is around 180 K from both neutron diffraction and magnetic susceptibility measurements.