Unveiling the (De)coupling of magnetostructural transition nature in magnetocaloric R5Si2Ge2 (R = Tb, Gd) materials

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Pereira, AM (Author) FCUP; Kampert, E (Author) Other; Moreira, JM (Author) FCUP; Zeitler, U (Author) Other; Belo, JH (Author) Other; Magen, C (Author) Other; Algarabel, PA (Author) Other; Morellon, L (Author) Other; Ibarra, MR (Author) Other; Goncalves, JN (Author) Other; Amaral, JS (Author) FCUP; Amaral, VS (Author) Other; Sousa, JB (Author) Other; Araujo, JP (Author) FCUP

Journal

Title: Applied Physics Letters

Vol. 99

Final page: 132510

ISSN: 0003-6951

Publisher: American Institute of Physics

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 17 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-002-MFT

DOI: 10.1063/1.3640213

Abstract (EN): We present a detailed study on the magnetization under high magnetic fields of Tb5Si2Ge2 and Gd5Si2Ge2 compounds. From the Arrott plot construction (A. Arrott, Phys. Rev. 108, 1394 (1957)), we were able to estimate the T-C of each structure (M and O(I)) experimentally and found that the T-C of the O(I) phase can be directly obtained by extrapolating the T-C curve of this phase in the respective phase diagram. Using a physical model based on free energy considerations, one explains the (de) coupling of the magnetic and structural transitions in R-5(SixGe1-x)(4) (R = Tb, Gd) compounds. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3640213]

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3