Local magnetic moments in a dinuclear Co{sup 2+} complex as seen by polarized neutron diffraction:Beyond the effective spin-(1/2) model

Journal Article · Sun May 01 00:00:00 EDT 2011 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.83.184429· OSTI ID:21544760

Borta, Ana; Luneau, Dominique; Jeanneau, Erwann ^[1]; Gillon, Beatrice; Gukasov, Arsen; Cousson, Alain ^[2]; Ciumacov, Iurii ^[1]; Sakiyama, Hiroshi; Tone, Katsuya ^[3]; Mikuriya, Masahiro ^[4]

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1. Laboratoire Leon Brillouin (LLB), CEA-CNRS, CE Saclay, F-91191 Gif-sur-Yvette Cedex (France)
2. Universite Claude Bernard Lyon 1, Laboratoire des Multimateriaux et Interfaces (UMR 5615), F-69622 Villeurbanne Cedex (France)
3. Faculty of Science, Yamagata University, 1-4-12 Kojirakawa, Yamagata 990-8560 (Japan)
4. School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337 (Japan)

Polarized neutron diffraction investigations of a paramagnetic molecular dinuclear Co{sup 2+} complex, using the local site susceptibility method, show that the Co{sup 2+} ions carry opposite magnetic moments of 3.1(1) and 3.2(1) {mu}{sub B}, making an angle of 37(1) deg. which is in agreement with the value (39 deg.) provided by the theoretical analysis of the magnetic susceptibility using the model of effective spin 1/2. Polarized neutron diffraction (PND) shows that this dinuclear Co{sup 2+} complex behaves more like a system of two antiferromagnetically coupled ions with spin 3/2, the directions of which are imposed by the distortion axis of the octahedra around each Co{sup 2+} ion due to ligand field. This first application of the local susceptibility tensor method to a molecular compound demonstrates the efficiency of the PND method as a tool for exploring magnetic anisotropy in molecular paramagnets.

• OSTI ID: 21544760
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 18; Other Information: DOI: 10.1103/PhysRevB.83.184429; (c) 2011 American Institute of Physics; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
COBALT COMPLEXES
COBALT IONS
EFFICIENCY
MAGNETIC MOMENTS
MAGNETIC SUSCEPTIBILITY
NEUTRON DIFFRACTION
PARAMAGNETISM
POLARIZED BEAMS
SPIN
ANGULAR MOMENTUM
BEAMS
CHARGED PARTICLES
COHERENT SCATTERING
COMPLEXES
DIFFRACTION
IONS
MAGNETIC PROPERTIES
MAGNETISM
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SCATTERING
TRANSITION ELEMENT COMPLEXES