Magnetic correlations in the intermetallic antiferromagnet Nd3Co4Sn13. (21st September 2017)

• Record Type: Journal Article
• Authors: Wang, C W; Lin, J W; Lue, C S; Liu, H F; Kuo, C N; Mole, R A; Gardner, J S
• Is Part Of: Journal of physics. Volume 29:Number 43(2017)
• Publication Date: 2017-09-21
• Subjects: intermetallic -- neutron scattering -- magnetic structure -- gapped excitation; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa8756
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Specific heat, magnetic susceptibility, and neutron scattering have been used to investigate the nature of the spin system in the antiferromagnet Nd3 Co4 Sn13 . At room temperature Nd3 Co4 Sn13 has a cubic, Pm- 3 n structure similar to Yb3 Rh4 Sn13 . Antiferromagnetic interactions between, Nd 3+ ions dominate the magnetic character of this sample and at 2.4 K the Nd spins enter a long range order state with a magnetic propagation vector q = (0 0 0) with an ordered moment of 1.78(2) µ B at 1.5 K. The magnetic Bragg intensity grows very slowly below 1 K, reaching ~2.4 µ B at 350 mK. The average magnetic Nd 3+ configuration corresponds to the 3D irreducible representation Γ7 . This magnetic structure can be viewed as three sublattices of antiferromagnetic spin chains coupled with each other in the 120°-configuration. A well-defined magnetic excitation was measured around the 1 1 1 zone centre and the resulting dispersion curve is appropriate for an antiferromagnet with a gap of 0.20(1) meV.