Effect of uniaxial pressure on helimagnetic structure in Lu.sub.2./sub.Fe.sub.17./sub..

0377219 - FZÚ 2013 RIV GB eng J - Článek v odborném periodiku
Kamarád, Jiří - Míšek, Martin - Prokeš, K. - Maťaš, S. - Arnold, Zdeněk
Effect of uniaxial pressure on helimagnetic structure in Lu₂Fe₁₇.
Journal of Physics: Conference Series. Roč. 340, č. 1 (2012), 1-4. ISSN 1742-6588. E-ISSN 1742-6596.
[European Conference on Neutron Scattering (ECNS)/5./. Prague, 17.07.2011-21.07.2011]
Grant CEP: GA ČR GA202/09/1027
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: spin arrangements in magnetically ordered materials * deformation * plasticity and creep * exchange and superexchange interactions
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

The incommensurate helimagnetic structure (IHS) in the Lu2Fe17 intermetallics has been induced at 5 K by hydrostatic pressure above 0.3 GPa and characterized by a propagation vector (00tz). The observed dependence of tz on external variables is discussed within a simple model based on a complex dependence of exchange interactions Jn,m (n, m = f, j, k and g) on distances between Fe-atoms in inequivalent positions 4f, 12j, 12k and 6g of the hexagonal P63/mmc crystal structure. To verify this model, we have studied magnetization and representative neutron reflections of Lu2Fe17 single crystals under high hydrostatic pressure and uniaxial compression with stress σ || a-axis and σ || c-axis.
Trvalý link: http://hdl.handle.net/11104/0209442