Magnetic transitions in Nd2NiO4
Five different magnetic phase transitions have been identified and characterized in stoichiometric Nd 2 NiO 4 by means of magnetic-susceptibility and isothermal-magnetization measurements. A collinear antiferromagnetic ordering of Ni 2 + magnetic moments exists between T N 1 ≊320 K and T c 1 ≊130 K...
| Autores: | , , , , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1991 |
| País: | España |
| Recursos: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/9947 |
| Acesso em linha: | https://hdl.handle.net/2445/9947 |
| Access Level: | acceso abierto |
| Palavra-chave: | Física de l'estat sòlid Magnetisme Solid state physics Magnetism |
| Resumo: | Five different magnetic phase transitions have been identified and characterized in stoichiometric Nd 2 NiO 4 by means of magnetic-susceptibility and isothermal-magnetization measurements. A collinear antiferromagnetic ordering of Ni 2 + magnetic moments exists between T N 1 ≊320 K and T c 1 ≊130 K where an orthorhombic-to-tetragonal structural phase transition occurs. In this temperature range, Nd 3 + ions follow a simple paramagnetic Curie-Weiss-like behavior, while a weak ferromagnetic component appears below 130 K. An internal magnetic field on the Nd 3 + ions develops with this structural phase transition. Two additional transitions are observed at T c 2 ≊68 K and T c 3 ≊45 K which are characterized by a sudden increase of the weak ferromagnetic component. Finally, a peak of the differential susceptibility at T N 2 ≊11 K marks a long-range antiferromagnetic ordering of the Nd 3 + ions. The internal magnetic field acting on the Nd ions was evaluated to be 5.2 T in the 20 K– T c 2 temperature range. |
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