Crystal structure and magnetic properties of Lu.sub.2./sub.Co.sub.17-x./sub.Si.sub.x./sub. single crystals

0343206 - FZÚ 2011 RIV GB eng J - Článek v odborném periodiku
Tereshina, Evgeniya - Andreev, Alexander V.
Crystal structure and magnetic properties of Lu₂Co_17-xSi_x single crystals.
Intermetallics. Roč. 18, č. 4 (2010), s. 641-648. ISSN 0966-9795. E-ISSN 1879-0216
Grant CEP: GA ČR GA202/09/0339
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: R₂Co₁₇ * single crystals * magnetic anisotropy * spin reorientation
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.327, rok: 2010

Single crystals of Lu2Co17-xSix within the homogeneity range of Si substitution for Co (0 ≤ x ≤ 3.4) were grown by the Czochralski method. Magnetization measurements have revealed that the parent Lu2Co17 compound has a spin-reorientation transition (SRT) from the easy plane to the easy axis at elevated temperatures which occurs as two second-order phase transitions, the “plane-cone” at TSR1 ≈ 670 K and the “cone-axis” at TSR2 ≈ 730 K. In Lu2Co16Si, the SRTs shift towards lower temperatures (TSR1 ≈ 75 K, TSR2 ≈ 130 K) and disappear for compounds with Si content x > 1 where the anisotropy is uniaxial over the whole range of magnetic ordering. A phenomenological discussion of Co-sublattice anisotropy, with reference to the model of individual site contribution to magnetic anisotropy (ISA) is provided.
Trvalý link: http://hdl.handle.net/11104/0185734