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RESEARCH PRODUCT
Magnetostrictive and quadrupolar anisotropy in nuclear magnetic fcc systems
M. SteinerK. Siemensmeyersubject
PhysicsCondensed matter physicschemistry.chemical_elementMagnetostrictionCondensed Matter PhysicsCopperEffective nuclear chargeElectronic Optical and Magnetic MaterialsCondensed Matter::Materials Sciencesymbols.namesakeDipolechemistryElectromagnetic shieldingQuadrupolesymbolsGeneral Materials ScienceHamiltonian (quantum mechanics)Anisotropydescription
The spin hamiltonian for nuclear magnetic order in copper is investigated with respect to magnetoelastic couplings to the lattice. These arise due to the dipolar, Ruderman Kittel and the quadrupolar interaction. While the latter is quenched for the ideal fcc-lattice, it is found that for copper it will dominate the magnetoelastic terms of the nuclear spin hamiltonian. The absolute size of the quadrupole contribution is determined by the effective charge and (anti-) shielding effects. This interaction can give rise to an effective anisotropy in the fcc-system which can be quite large compared to the small stabilisation energies for nuclear order in copper. Consequences for the nuclear ordering in copper are briefly discussed and compared to the available experimental and theoretical data.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1992-10-01 | Zeitschrift f�r Physik B Condensed Matter |