Principal interactions in the magnetic system Fe{sub 1-x}Co{sub x}Si: Magnetic structure and critical temperature by neutron diffraction and SQUID measurements
- Petersburg Nuclear Physics Institute, Gatchina, 188300 St. Petersburg (Russian Federation)
- Institut fuer Physik der Kondensierten Materie, TU Braunschweig, 38106 Braunschweig (Germany)
- GKSS Forschungszentrum, 21502 Geesthacht (Germany)
The compound Fe{sub 1-x}Co{sub x}Si is a good representative for a cubic magnet with Dzyaloshinskii-Moriya interaction. On the basis of the neutron diffraction and superconducting quantum interference device measurements, we built the H-T phase diagram for the compound with different x from 0.1 to 0.7. The same set of parameters governs the magnetic system for different x. These parameters are well interpreted in the framework of the recently developed theory [S. V. Maleyev, Phys. Rev. B 73, 174402 (2006)]. As a result, the spin-wave stiffness, the Dzyaloshinskii constant, the anisotropic exchange constant, and the spin-wave gap caused by the Dzyaloshinskii interaction have been obtained and plotted as a function of x. The changes of the magnetic structure with x can be well interpreted on the basis of our findings.
- OSTI ID:
- 21055179
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 76, Issue 9; Other Information: DOI: 10.1103/PhysRevB.76.092407; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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