Transport properties near the magneto/structural transition of Tb5Si2Ge2

• Type: Article in International Scientific Journal
• Date: 2008

Authors

pereira, a. m. (Author) Other; magen, c. (Author) Other; braga, m. e. (Author) Other; pinto, r. p. (Author) Other; fermento, r. (Author) Other; algarabel, p. a. (Author) Other; morellon, l. (Author) Other; ibarra, m. r. (Author) Other; araujo, j. p. (Author) FCUP; sousa, j. b. (Author) FCUP

Journal

Title: Journal of Non-Crystalline Solids

Vol. 354 No. 2585

Pages: 5298-5300

ISSN: 0022-3093

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 8 Citations

Other information

Authenticus ID: P-003-TKF

DOI: 10.1016/j.jnoncrysol.2008.05.069

Abstract (EN): We report high resolution measurements of the electrical resistivity (rho, d rho/dT) and thermopower (S, dS/dT) measurements near the magnetic and structural transition of the layered Tb5Si2Ge2 compound, which are fairly close but not fully coupled. The analysis of the transport properties confirms a split magneto/structural transition, with T-s similar to 97 K and T-s similar to 107 K for the structural transition (on cooling and heating respectively; 1st-order transition). The magnetic transition occurs only at T-c similar to 112 K and without hysteresis (2nd-order transition). The magnetic critical behavior of resistivity is analyzed, obtaining an almost classical mean field exponent (alpha similar to 0.59) for T > T-c. For the structural phase, and below Ts, we obtain a rather different exponent (alpha similar to 1.06).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3