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Magnetic phase transitions in Pr 1 x Dy x Mn 2 Ge 2 and Ce 1 x Dy x Mn 2 Ge 2

2003; IOP Publishing; Volume: 15; Issue: 4 Linguagem: Inglês

10.1088/0953-8984/15/4/306

1361-648X

Ayhan Elmalı, İ. Dinçer, Y. Elerman, Helmut Ehrenberg, H. Fueß,

Magnetic and transport properties of perovskites and related materials

The magnetic properties of the compounds Pr1−xDyxMn2Ge2 (0 ≤ x ≤ 1) and Ce1−xDyxMn2Ge2 (0 ≤ x ≤ 1) were investigated by means of temperature-dependent DC magnetization measurements in low external magnetic fields. The substitution of Dy for Pr or Ce leads to a linear decrease in the lattice parameters. Below about 330 K, the interlayer magnetic coupling in the Mn sublattice is ferromagnetic for Pr-rich and Ce-rich compounds and antiferromagnetic for Dy-rich compounds. At low temperatures, the Dy sublattice also orders and reconfigures the ordering in the Mn sublattice. This leads to ferrimagnetic ordering for Dy-rich compounds.