- Tytuł:
- Magnetic, Thermal and Transport Properties of $YbPt_2Si_2$ and $Yb_2Pt_3Si_5$ Single Crystals
- Autorzy:
-
Fikáček, J.
Prchal, J.
Sechovský, V. - Powiązania:
- https://bibliotekanauki.pl/articles/1371255.pdf
- Data publikacji:
- 2014-07
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
61.50.-f
75.20.En
75.30.Mb - Opis:
- Single crystals of $YbPt_{2}Si_{2}$ and $Yb_{2}Pt_{3}Si_{5}$ have been prepared by solvent growth method with Sn flux, characterized by X-ray diffraction and by EDX microprobe analysis and investigated by measurement of magnetization, specific heat and electrical resistivity as functions of temperature and magnetic field. $YbPt_{2}Si_{2} (Yb_{2}Pt_{3}Si_{5})$ crystalizes in the tetragonal $CaBe_{2}Ge_{2}$-type (orthorhombic $U_{2}Co_{3}Si_{5}$-type) structure. Both compounds exhibit metallic resistivity behavior without visible anomaly, which could be connected with onset of magnetic ordering. Neither the specific heat shows any sign of magnetic ordering down to 0.5 K. The corresponding temperature dependences of the magnetic susceptibility of both compounds behave qualitatively similar, which is reminiscent of spin fluctuation behavior: a broad maximum at high temperatures, a shallow minimum at lower temperatures, followed by an upturn with further cooling the crystal, which can be suppressed by applying a sufficient magnetic field. The rather low values of the γ-coefficients of the specific heat (~25÷35 mJ·mol·$K^{-2}$) do not support the mixed valence scenario discussed in literature for $YbPt_{2}Si_{2}$.
- Źródło:
-
Acta Physica Polonica A; 2014, 126, 1; 310-311
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł