Local Breaking of Fourfold Rotational Symmetry by Short-Range Magnetic Order in Heavily Overdoped Ba(Fe1-xCux)2As2

Published

October 11, 2017

Author(s)

Weiyi Wang, Yu Song, Ding Hu, Yu Li, Rui Zhang, Leland Harriger, Wei Tian, Huibo Cao, Pengcheng Dai

Abstract

We investigate Cu-doped Ba(Fe_1-xCu_x)₂As₂ with transport, magnetic susceptibility, and elastic neutron scattering measurements. In the heavily Cu-doped regime where long-range stripe-type antiferromagnetic order in BaFe₂As₂ is suppressed, Ba(Fe_1-xCu_x)₂As₂ (0.145 less than or equal to} x less than or equal to}0.553) samples exhibit spin-glass-like behavior in magnetic susceptibility and insulating-like temperature dependence in electrical transport. Using elastic neutron scattering, we find stripe-type short-range magnetic order in the spin-glass region identified by susceptibility measurements. The persistence of short-range magnetic order over a large doping range in Ba(Fe_1-xCu_x)₂As₂ likely arises from local arrangements of Fe and Cu that favor magnetic order, with Cu acting as vacancies relieving magnetic frustration and degeneracy. These results indicate locally broken four-fold rotational symmetry, suggesting that stripe-type magnetism is ubiquitous in iron pnictides.

Citation

Physical Review B

Volume

96

Issue

16

Pub Type

Journals

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Keywords

Magnetism, Neutron Scattering, Superconductivity, Pnictides

Citation

Wang, W. , Song, Y. , Hu, D. , Li, Y. , Zhang, R. , Harriger, L. , Tian, W. , Cao, H. and Dai, P. (2017), Local Breaking of Fourfold Rotational Symmetry by Short-Range Magnetic Order in Heavily Overdoped Ba(Fe_1-xCu_x)₂As₂, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=923961 (Accessed December 26, 2024)