GdPtPb: A noncollinear antiferromagnet with distorted kagome lattice

Manni, S.; Bud'ko, Sergey L.; Canfield, Paul C.

doi:10.1103/PhysRevB.96.054435

GdPtPb: A noncollinear antiferromagnet with distorted kagome lattice

Journal Article · Thu Aug 24 00:00:00 EDT 2017 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.96.054435· OSTI ID:1396272

Manni, S. ^[1]; Bud'ko, Sergey L. ^[1]; Canfield, Paul C. ^[1]

Iowa State Univ., Ames, IA (United States)

In the spirit of searching for Gd-based, frustrated, rare earth magnets, we have found antiferomagnetism (AF) in GdPtPb, which crystallizes in the ZrNiAl-type structure that has a distorted kagome lattice of Gd triangles. Single crystals were grown and investigated using structural, magnetic, transport, and thermodynamic measurements. GdPtPb orders antiferromagnetically at 15.5 K, arguably with a planar, noncollinear structure. The high temperature magnetic susceptibility data reveal an “anti-frustration” behavior having a frustration parameter, |f| = |Θ|/T_N = 0.25, which can be explained by mean field theory within a two-sublattice model. Here, the study of the magnetic phase diagram down to T = 1.8K reveals a change of magnetic structure through a metamagnetic transition at around 20 kOe and the disappearance of the AF ordering near 140 kOe. In total, our work indicates that GdPtPb can serve as an example of a planar, noncollinear AF with a distorted kagome magnetic sublattice.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1396272

Alternate ID(s):: OSTI ID: 1376926

Report Number(s):: IS-J--9430

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 5 Vol. 96; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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