Helical magnetism and structural anomalies in triangular lattice α-SrCr2O4
α-SrCr(2)O(4) has a triangular planar lattice of d(3) Cr(3+) made from edge sharing CrO(6) octahedra; the plane shows a very small orthorhombic distortion from hexagonal symmetry. With a Weiss temperature of - 596 K and a three-dimensional magnetic ordering temperature of 43 K, the magnetic system i...
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| Veröffentlicht in: | Journal of physics. Condensed matter 2011-06, Vol.23 (24), p.246005-246005 |
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| container_title | Journal of physics. Condensed matter |
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| creator | Dutton, S E Climent-Pascual, E Stephens, P W Hodges, J P Huq, A Broholm, C L Cava, R J |
| description | α-SrCr(2)O(4) has a triangular planar lattice of d(3) Cr(3+) made from edge sharing CrO(6) octahedra; the plane shows a very small orthorhombic distortion from hexagonal symmetry. With a Weiss temperature of - 596 K and a three-dimensional magnetic ordering temperature of 43 K, the magnetic system is quasi-two-dimensional and frustrated. Neutron powder diffraction shows that the ordered state is an incommensurate helical magnet, with an in-plane propagation vector of k = (0, 0.3217(8), 0). Temperature dependent synchrotron powder diffraction characterization of the structure shows an increase in the inter-plane spacing on cooling below 100 K and an inflection in the cell parameters at the magnetic ordering temperature. These anomalies indicate the presence of a moderate degree of magnetostructural coupling. |
| doi_str_mv | 10.1088/0953-8984/23/24/246005 |
| format | Article |
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With a Weiss temperature of - 596 K and a three-dimensional magnetic ordering temperature of 43 K, the magnetic system is quasi-two-dimensional and frustrated. Neutron powder diffraction shows that the ordered state is an incommensurate helical magnet, with an in-plane propagation vector of k = (0, 0.3217(8), 0). Temperature dependent synchrotron powder diffraction characterization of the structure shows an increase in the inter-plane spacing on cooling below 100 K and an inflection in the cell parameters at the magnetic ordering temperature. 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Condensed matter</title><addtitle>J Phys Condens Matter</addtitle><description>α-SrCr(2)O(4) has a triangular planar lattice of d(3) Cr(3+) made from edge sharing CrO(6) octahedra; the plane shows a very small orthorhombic distortion from hexagonal symmetry. With a Weiss temperature of - 596 K and a three-dimensional magnetic ordering temperature of 43 K, the magnetic system is quasi-two-dimensional and frustrated. Neutron powder diffraction shows that the ordered state is an incommensurate helical magnet, with an in-plane propagation vector of k = (0, 0.3217(8), 0). Temperature dependent synchrotron powder diffraction characterization of the structure shows an increase in the inter-plane spacing on cooling below 100 K and an inflection in the cell parameters at the magnetic ordering temperature. These anomalies indicate the presence of a moderate degree of magnetostructural coupling.</description><subject>Chromates - chemistry</subject><subject>Chromium Compounds - chemistry</subject><subject>CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Condensed matter: structure, mechanical and thermal properties</subject><subject>CURIE-WEISS LAW</subject><subject>DIFFRACTION</subject><subject>Exact sciences and technology</subject><subject>Inorganic compounds</subject><subject>Magnetic properties and materials</subject><subject>Magnetically ordered materials: other intrinsic properties</subject><subject>Magnetics</subject><subject>MAGNETISM</subject><subject>Molecular Conformation</subject><subject>NEUTRONS</subject><subject>Physics</subject><subject>Salts</subject><subject>Saturation moments and magnetic susceptibilities</subject><subject>Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)</subject><subject>Strontium - chemistry</subject><subject>Structure of solids and liquids; 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crystallography</topic><topic>Structure of specific crystalline solids</topic><topic>SYMMETRY</topic><topic>SYNCHROTRONS</topic><topic>Temperature</topic><topic>VECTORS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dutton, S E</creatorcontrib><creatorcontrib>Climent-Pascual, E</creatorcontrib><creatorcontrib>Stephens, P W</creatorcontrib><creatorcontrib>Hodges, J P</creatorcontrib><creatorcontrib>Huq, A</creatorcontrib><creatorcontrib>Broholm, C L</creatorcontrib><creatorcontrib>Cava, R J</creatorcontrib><creatorcontrib>BROOKHAVEN NATIONAL LABORATORY (BNL)</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><collection>OSTI.GOV</collection><jtitle>Journal of physics. 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| subjects | Chromates - chemistry Chromium Compounds - chemistry CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties CURIE-WEISS LAW DIFFRACTION Exact sciences and technology Inorganic compounds Magnetic properties and materials Magnetically ordered materials: other intrinsic properties Magnetics MAGNETISM Molecular Conformation NEUTRONS 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.) Strontium - chemistry Structure of solids and liquids crystallography Structure of specific crystalline solids SYMMETRY SYNCHROTRONS Temperature VECTORS |
| title | Helical magnetism and structural anomalies in triangular lattice α-SrCr2O4 |
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