Electrical resistivity of RNi4Al and RNi4Cu

• Autorzy: Toliński T. , Ivanov V. , Kowalczyk A.
• Języki publikacji: EN

Abstrakty

EN

A comparative studies of the temperature dependence of resistivity for RNi4X (X = Al, Cu; R = Y or rare earth) compounds are presented. These results are also compared to the previously studied RNi4B. The ordering temperatures are well identified on the ?(T) curves. The residual resistivity ?0 of RNi4Al is several times higher than for RNi4Cu and RNi4B. The YNi4X compounds are included in these studies as the nonmagnetic isostructural reference materials. The phonon contribution has been determined for both Y-based compounds employing the Bloch-Grüneisen formula. The CeNi4X compounds show a shallow minimum in ?(T) at low temperatures (about 15 K). This anomaly has been ascribed to a Kondo impurity - like behavior. For the other rare earths, the ?(T) dependences below TC have been analyzed assuming the scattering on magnons as the predominant mechanism.

Słowa kluczowe

EN

rare earth compounds; electrically calibrated pyroelectric radiometer

PL

oporność właściwa; rezystywność; związki ziem rzadkich

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2006
• Tom: Vol. 24, No. 3
• Strony: 789--793
• Opis fizyczny: Bibliogr. 6 poz.

Twórcy

autor

Toliński T.

autor

Ivanov V.

autor

Kowalczyk A.

• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań,

Bibliografia

• [1] TOLIŃSKI T., KOWALCZYK A., IVANOV V., Phys. Stat. Sol. (b), 240 (2003), 153.
• [2] TOLIŃSKI T., KOWALCZYK A., CHEŁKOWSKA G., PUGACZOWA-MICHALSKA M., ANDRZEJEWSKI B., IVANOV V., SZEWCZYK A., GUTOWSKA M., Phys. Rev. B, 70 (2004), 064413.
• [3] TOLIŃSKI T., KOWALCZYK A., PUGACZOWA-MICHALSKA M., CHELKOWSKA G., J. Phys.: Condens. Matter, 15 (2003), 1397.
• [4] TOLIŃSKI T., SCHÄFER W., KOCKELMANN W., KOWALCZYK A., HOSER A., Phys. Rev. B, 68 (2003), 144403.
• [5] ANDERSEN N.H., SMITH H., Phys. Rev. B, 19 (1979), 384.
• [6] TOLIŃSKI T., KOWALCZYK A., SZLAFEREK A., ANDRZEJEWSKI B., KOVÁČ J., TIMKO M., J. Alloys Comp., 347 (2002), 31.