Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2. (1st June 2015)

• Record Type: Journal Article
• Authors: Ghimire, N J; Calder, S; Janoschek, M; Bauer, E D
• Is Part Of: Journal of physics. Volume 27:Number 24(2015)
• Publication Date: 2015-06-01
• Subjects: Kondo lattice compounds -- neutron diffraction -- magnetic structure; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/0953-8984/27/24/245603
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We have investigated the magnetic ground state of the antiferromagnetic Kondo-lattice compounds CeMAl4 Si2 ( M = Rh, Ir) using neutron powder diffraction. Although both of these compounds show two magnetic transitions T N1 and T N2 in the bulk properties measurements, evidence for magnetic long-range order was only found below the lower transition T N2 . Analysis of the diffraction profiles reveals a commensurate antiferromagnetic structure with a propagation vectork = (0, 0, 1/2). The magnetic moment in the ordered state of CeRhAl4 Si2 and CeIrAl4 Si2 were determined to be 1.14(2) and 1.41(3) μ B Ce −1, respectively, and are parallel to the crystallographic c -axis in agreement with magnetic susceptibility measurements.