Abstract
Five different magnetic phase transitions have been identified and characterized in stoichiometric by means of magnetic-susceptibility and isothermal-magnetization measurements. A collinear antiferromagnetic ordering of magnetic moments exists between ≊320 K and ≊130 K where an orthorhombic-to-tetragonal structural phase transition occurs. In this temperature range, ions follow a simple paramagnetic Curie-Weiss-like behavior, while a weak ferromagnetic component appears below 130 K. An internal magnetic field on the ions develops with this structural phase transition. Two additional transitions are observed at ≊68 K and ≊45 K which are characterized by a sudden increase of the weak ferromagnetic component. Finally, a peak of the differential susceptibility at ≊11 K marks a long-range antiferromagnetic ordering of the ions. The internal magnetic field acting on the Nd ions was evaluated to be 5.2 T in the 20 K– temperature range.
- Received 1 October 1990
DOI:https://doi.org/10.1103/PhysRevB.43.10451
©1991 American Physical Society