Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/22106
Title: Magnetic transitions in Pr2NiO4 single crystal
Author: Obradors, Xavier
Martínez Perea, Benjamin
Batlle Gelabert, Xavier
Rodríguez Carvajal, Juan
Fernández-Diaz, M. T.
Martínez, J. L.
Odier, P.
Keywords: Propietats magnètiques
Anisotropia
Ferromagnetisme
Spin (Física nuclear)
Cristal·lografia
Matèria condensada
Magnetic properties
Anisotropy
Ferromagnetism
Nuclear spin
Cristallography
Condensed matter
Issue Date: 1991
Publisher: American Institute of Physics
Abstract: The magnetic properties of a stoichiometric Pr2NiO4 single crystal have been examined by means of the temperature dependence of the complex ac susceptibility and the isothermal magnetization in fields up to 200 kOe at T=4.2 K. Three separate phases have been identified and their anisotropic character has been analyzed. A collinear antiferromagnetic phase appears first between TN = 325 K and Tc1 = 115 K, where the Pr ions are polarized by an internal magnetic field. At Tc1 a first modification of the magnetic structure occurs in parallel with a structural phase transition (Bmab to P42/ncm). This magnetic transition has a first‐order character and involves both the out‐of‐plane and the in‐plane spin components (magnetic modes gx and gxcyfz, respectively). A second magnetic transition having also a first‐order character is also clearly identified at Tc2 = 90 K which corresponds to a spin reorientation process (gxcyfz to cxgyaz magnetic modes). It should be noted as well that the out‐of‐phase component of χac shows a peak around 30 K which reflects the coexistence of both magnetic configurations in a wide temperature interval. Finally, two field‐induced transitions have been observed at 4.2 K when the field is directed along the c axis. We propose that the high‐field anomaly arises from a metamagnetic transition of the weak ferromagnetic component, similarly to La2CuO4.
Note: Reproducció del document publicat a: http://dx.doi.org/10.1063/1.349958
It is part of: Journal of Applied Physics, 1991, vol. 70, núm. 10, p. 6329-6331
Related resource: http://dx.doi.org/10.1063/1.349958
URI: http://hdl.handle.net/2445/22106
ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

Files in This Item:
File Description SizeFormat 
82542.pdf420.32 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.