Ferromagnetic Order in the Intermetallic Alloys laNi5-xMgx

D.N Ba (1International Training Institute for Materials Science, Hanoi University of Technology, 1 Dai Co Viet, Hanoi)
L.T Tai (2Faculty of Physics, College of Natural Science, Vietnam National University, 334 Nguyen Trai, Hanoi)
N.T Trung (3Department of Radiation, Radionuclides & Reactors, Delft University of Technology, Mekelweg 15, 2629 JB Delft)
N.T Huy (Hanoi Advanced School of Science and Technology, Hanoi University of Technology, 40 Ta Quang Buu, Hanoi)

ASEAN Journal on Science and Technology for Development
Vol. 29 No. 1 (2012): ASEAN Journal on Science and Technology for Development (AJSTD)

The influences of the substitution of Ni with Mg on crystallographic and magnetic properties of the intermetallic alloys LaNi5-xMgx (x ? 0.4) were investigated. The X-ray diffraction patterns showed that all samples were of single phase, and the lattice parameters, a and c, decreased slightly upon chemical doping. LaNi5 is well known as an exchange-enhanced Pauli paramagnet. Interestingly, in LaNi5-xMgx, the ferromagnetic order existed even with a small amount of dopants; the Curie temperature reached the value of room temperature for x = 0.2, and enhanced with increasing x.