Structural, magnetic, magneto-caloric and Mössbauer spectral study of Tb2Fe17 compound synthesized by arc melting

• Tb2Fe17 single-phase synthesized by simple arc-melting without any heat treatment.
• The crystal structure is hexagonal with P63/mmc space group.
• The magnetic entropy change of the sample was determined by Maxwell relation.
• Hyperfine parameters, magnetic and magnetocaloric properties were studied.

We have synthesized the intermetallic Tb2Fe17 compound in hexagonal crystal structure by arc-melting without annealing. X-ray diffraction pattern has been refined by Rietveld method. The crystal structure is hexagonal with P63/mmc space group (Th2Ni17-type). The Mössbauer spectrum of Tb2Fe17 compound has been analyzed with seven magnetic sextets assigned to the inequivalent crystallographic sites. The temperature dependence of magnetization data revealed that Tb2Fe17 exhibits a second-order ferromagnetic to paramagnetic phase transition in the vicinity of Curie temperature (TC=412 K). The relative cooling power around the magnetic transition and the Arrott plots are also reported.

A 3D surface showing the temperature and applied magnetic field dependencies of the magnetization for Tb2Fe17 compound (left). Rietveld analysis of the XRD pattern (right). Crystal structure for the hexagonal P63/mmc Tb2Fe17 (bottom).Figure optionsDownload as PowerPoint slide