Non-linear c-f exchange interaction effect and magnetic properties of rare-earth metals. I. Phase boundaries
- 1 April 1981
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 11 (4) , 883-903
- https://doi.org/10.1088/0305-4608/11/4/018
Abstract
The authors have investigated the role of non-linear c-f exchange interaction effect on the magnetic properties of the rare-earth metals. Using a simple band model they obtained the magnetic phase diagram at zero temperature. The non-linear effect stabilised the cone structure without the crystal field and caused the ferromagnetic transition. The magnitude of the helical wavevector Q decreased as the helical component mod (S(Q)) mod increased. When (S) was regarded as the observed magnetisation, the temperature dependence of Q agreed with the experimental results. The magnetic properties of Gd and its alloys were considered on this phase diagram. The effective lifetimes of the c electrons were also important for the phase diagram. The crystal field made the phase diagram complicated. For the easy plane anisotropy, the fan appeared instead of the cone. For the easy axis anisotropy, the helix was squared by the higher harmonics and became the antiphase domain structure in infinitesimal c-f exchange.Keywords
This publication has 33 references indexed in Scilit:
- Spin-wave temperature dependence of gadoliniumJournal of Applied Physics, 1978
- Augmented-plane-wave calculation of indirect-exchange matrix elements for gadoliniumPhysical Review B, 1974
- Spin-polarized energy-band structure, conduction-electron polarization, spin densities, and the neutron magnetic form factor of ferromagnetic gadoliniumPhysical Review B, 1974
- Theory of Magnetic Ordering in the Heavy Rare EarthsPhysical Review B, 1969
- Magnetic Properties of Rare Earth MetalsPublished by Elsevier ,1968
- Fermi Surface, Magnetic Ordering, and Electrical Properties of Rare-Earth MetalsPhysical Review Letters, 1966
- Band Structure and Magnetism of Gadolinium MetalPhysical Review Letters, 1964
- The temperature dependence of magnetic ordering in the heavy rare earth metalsProceedings of the Physical Society, 1964
- Helical structures of the heavy rare earth metalsSolid State Communications, 1963
- The variation of periodicity of magnetic structure with dilution and temperature for the heavy rare earth metalsPhysics Letters, 1963