Szczegóły publikacji
Opis bibliograficzny
Magnetic phase transitions in ${RIrGe_{2}}$ (R = Tb, Ho) compounds / S. Baran, Ł. GONDEK, K. Nenkov, B. Penc, A. Szytuła, A. Zarzycki, I. Puente Orench, J. A. Rodríguez-Velamazán // Journal of Magnetism and Magnetic Materials ; ISSN 0304-8853 . — 2010 — vol. 322 iss. 4, s. 405–412. — Bibliogr. s. 412, Abstr.
Autorzy (8)
- Baran Stanisław
- AGHGondek Łukasz
- Nenkov Konstantin
- Penc Bogusław
- Szytuła Andrzej
- Zarzycki Arkadiusz
- Puente Orench I.
- Rodríguez-Velamazán J. A.
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 51450 |
|---|---|
| Data dodania do BaDAP | 2010-04-22 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jmmm.2009.09.065 |
| Rok publikacji | 2010 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Magnetism and Magnetic Materials |
Abstract
The magnetic phase transitions of the ternary compounds TbIrGe2 and HoIrGe2 have been studied by magnetic, specific heat and neutron diffraction measurements. Both compounds crystallize in the orthorhombic YIrGe2 -type structure (space group Immm) in which the rare earth atoms occupy two non-equivalent crystallographic sites. The rare earth magnetic moments at different crystallographic sites order independently with two different types of magnetic ordering. The Tb and Ho moments at 4 i site form a collinear commensurate antiferromagnetic structure (Tb moments lie in bc -plane while those of Ho in ab -plane). The magnetic moments at 4 h site also form a collinear antiferromagnetic structure at low temperature but the orientation of magnetic moments is different: Tb moments are aligned along the c-axis while Ho moments lie in ac -plane (in case of TbIrGe2 the magnetic unit cell is four times larger than the crystallographic one). In TbIrGe2 the magnetic order of moments at 4 h site at Tt = 9 K turns into a sine modulated one with over(k, ⇒) = [0.45, 0, 0]. The Néel temperatures for the different sublattices are: for 4 h site ∼ 12 K (Tb) and 5 K (Ho) and for 4 i site: 10 K (Tb) and 2.3 K (Ho). The above results suggest that interactions between the moments at 4 h site are stronger than those for 4 i site. Each sublattice has an uniaxial antiferromagnetic moment arrangement but different reorientation processes and different ordering temperatures reflect the presence of two distinct order parameters.
