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Journal of Magnetism and Magnetic Materials, Volume 341, September 2013, Pages 129-132.
Heeju Lee, Y.N. Choi, A.N. Pirogov, V.A. Kazantsev, E.G. Gerasimov
Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 305-353, Republic of Korea
Institute of Metal Physics of UD of Russian Academy of Sciences, 620990 Ekaterinburg, Russia
Abstract
The magnetic properties of a mixed inter-metallic compound, Tb0.95Er0.05Ni5, were investigated using a neutron diffraction method at low temperatures. These compounds were known to have a successive magnetic phase transition from the paramagnetic state at high temperature to a lock-in phase at low temperature through intermediate phases, i.e., PM(paramagnetic)–FM(ferromagnetic)–IC(incommensurate)–L(lock-in) in reverse order of temperature. A meta-magnetic phase transition between an IC phase and a FM phase at 9 K was observed with the critical field, HMT~200 mT. A new magnetic phase between the new phase (lock-in phase) and an IC phase has been observed. From the field dependence of the Bragg reflections and their satellite peaks at low temperatures (3–12 K), weak field driven first-order magnetic phase transitions were recorded at six fixed temperatures. The critical magnetic field decreases exponentially with the temperature. From these experimental results, we obtained a magnetic phase diagram of Tb0.95Er0.05Ni5 at a low temperature region for the first time.
