Magnetic structure of the antiferromagnetic Kondo lattice compounds CeRhAl4Si2 and CeIrAl4Si2

被引：11

作者：

Ghimire, N. J. ^{[1
]}

Calder, S. ^{[2
]}

Janoschek, M. ^{[1
]}

Bauer, E. D. ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] Oak Ridge Natl Lab, Quantum Condensed Matter Div, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2015年 / 27卷 / 24期

关键词：

Kondo lattice compounds; neutron diffraction; magnetic structure;

D O I：

10.1088/0953-8984/27/24/245603

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have investigated the magnetic ground state of the antiferromagnetic Kondo-lattice compounds CeMAl4Si2 (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 vector k = (0, 0, 1/2). The magnetic moment in the ordered state of CeRhAl4Si2 and CeIrAl4Si2 were determined to be 1.14(2) and 1.41(3)mu(B) Ce-1, respectively, and are parallel to the crystallographic c-axis in agreement with magnetic susceptibility measurements.

引用

页数：6

共 23 条

[1] Critical quasiparticle theory applied to heavy fermion metals near an antiferromagnetic quantum phase transition [J].