Low Temperature Magnetic Ordering of the Magnetic Ionic Plastic Crystal, Choline[FeCl4]. (November 2015)

• Record Type: Journal Article
• Authors: de Pedro, I; García-Saiz, A; Andreica, D; Barquín, L Fernández; Fernández-Díaz, M T; Blanco, J A; Amato, A; Fernández, J Rodríguez
• Is Part Of: Journal of physics. Number 663(2015)
• Publication Date: 2015-11
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/663/1/012012
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We report on the nature of the low temperature magnetic ordering of a magnetic ionic plastic crystal, Choline[FeCl4 ]. This investigation was carried out using heat capacity measurements, neutron diffraction experiments and muon spin relaxation (μSR) spectroscopy. The calorimetric measurements show the onset of an unusual magnetic ordering below 4 K with a possible second magnetic phase transition below 2 K. Low temperature neutron diffraction data reveal a three dimensional antiferromagnetic ordering at 2 K compatible with the previous magnetometry results. The analysis of μSR spectra indicates a magnetic phase transition below 2.2 K. At 1.6 K, the analysis of the shape of the μSR spectra suggests the existence of an additional magnetic phase with features of a possible incommensurate magnetic structure.