Low temperature magnetism of La1-xSrxCoO3 (x∝0.002)
Creators
- 1. IFW Dresden, D-01171 Dresden (Germany)
- 2. Zavoisky Physical Technical Institute, RAS, 420029 Kazan (Russian Federation)
- 3. Hahn-Meitner-Institut, D-14109 Berlin (Germany)
- 4. Laboratory for Neutron Scattering, ETH Zuerich and PSI, CH-5232 Villigen PSI (Switzerland)
- 5. Laboratory for Developments and Methods, PSI, CH-5232 Villigen PSI (Switzerland)
- 6. II. Physikalisches Institut, Universitaet zu Koeln, 50937 Koeln (Germany)
Description
We present results of electron spin- (ESR), nuclear magnetic resonance (NMR) and inelastic neutron scattering (INS) studies of single crystals of La1-xSrxCoO3. In contrast to LaCoO3, which is nonmagnetic at T <or similar 30 K, a very small Sr2+ doping (x∝0.002) yields a strong magnetization already at low T. 59Co NMR measurements indicate the formation of extended magnetic clusters in this temperature regime. ESR spectroscopy reveals multiple gapped resonance excitations with different g-factor values suggesting that magnetic clusters have a large spin multiplicity and substantial spin-orbital coupling. The Q-dependence of the INS intensity gives evidence that the cluster comprises 7 magnetic Co ions. We argue that the doped hole couples these ions ferromagnetically yielding a spin-state polaron with a huge local magnetic moment.
Additional details
Identifiers
Publishing Information
- Journal Title
- Verhandlungen der Deutschen Physikalischen Gesellschaft
- Journal Issue
- Dresden 2009 issue
- Series
- Also available as printed version: Verhandlungen der Deutschen Physikalischen Gesellschaft v. 44(5)
- Journal Page Range
- [1 p.]
- ISSN
- 0420-0195
- CODEN
- VDPEAZ
Conference
- Title
- DPG Spring meeting 2009 of the condensed matter section with the divisions biological physics, chemical and polymer physics, dielectric solids, dynamics and statistical physics, low temperature physics, magnetism, metal and material physics, semiconductor physics, surface science, thin films, vacuum science and technology as well as the working groups industry and business, physics of socio-economic systems
- Dates
- 22-27 Mar 2009
- Place
- Dresden (Germany)
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 41053634
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- COBALT 59; COBALT IONS; COBALT OXIDES; DOPED MATERIALS; ELECTRON SPIN RESONANCE; EXCITED STATES; FERROMAGNETISM; HOLES; INELASTIC SCATTERING; LANDE FACTOR; LANTHANUM OXIDES; L-S COUPLING; MAGNETIC DIPOLE MOMENTS; MAGNETIC MATERIALS; MAGNETIZATION; MONOCRYSTALS; NEUTRON DIFFRACTION; NUCLEAR MAGNETIC RESONANCE; POLARONS; SOLID CLUSTERS; SPECTRA; SPIN; STRONTIUM CHLORIDES; STRONTIUM OXIDES; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 0013-0065 K
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; CHALCOGENIDES; CHARGED PARTICLES; CHLORIDES; CHLORINE COMPOUNDS; COBALT COMPOUNDS; COBALT ISOTOPES; COHERENT SCATTERING; COUPLING; CRYSTALS; DIFFRACTION; DIMENSIONLESS NUMBERS; DIPOLE MOMENTS; ENERGY LEVELS; HALIDES; HALOGEN COMPOUNDS; INTERMEDIATE COUPLING; INTERMEDIATE MASS NUCLEI; IONS; ISOTOPES; LANTHANUM COMPOUNDS; MAGNETIC MOMENTS; MAGNETIC RESONANCE; MAGNETISM; MATERIALS; NUCLEI; ODD-EVEN NUCLEI; OXIDES; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; QUASI PARTICLES; RARE EARTH COMPOUNDS; RESONANCE; SCATTERING; STABLE ISOTOPES; STRONTIUM COMPOUNDS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- Session: TT 6.19 Mo 13:00; No further information available