Disappearance of Magnetic Transition in (Ce,Gd)Ni5 System

A. Dzubinskaa, b, J.R. Fernandezb, M. Reiffersc, J.I. Espesob, R. Vargad, J.C. Gomez Salb aFaculty of Science, Pavol Jozef Safarik University, Park Angelinum 9, 040 01 Kosice, Slovakia bDept. of Earth Sciences and Condensed Matter Physics, University of Cantabria, Av. de los Castros s/n, 390 05 Santander, Spain cFaculty of Humanities and Natural Sciences, University of Presov, ul. 17 novembra 1, 081 16 Presov, Slovakia dCPM-TIP, UPJS, 041 54 Kosice, Slovakia

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We present the results of an experimental study focused around CeNi5 in the CexGd1-xNi5 system. Pseudo-binary bulk samples were prepared with concentration of x=0.85, 0.9, 0.95, and 0.97 by arc melting method. The structural analysis confirmed the CaCu5 hexagonal crystal structure with P6/mmm space group and proved the existence of a single phase in all of them. The measurement of the magnetic properties shows that the increase of the Ce content leads to lower TC values. Above x=0.9 spin fluctuations behaviour appears with a shoulder in M(T) around T=130 K. Heat capacity measurements support these observations.

DOI:10.12693/APhysPolA.137.760 topics: physical properties, spin fluctuations, magnetic ordering