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research article

Bulk single-crystal growth of the theoretically predicted magnetic Weyl semimetals RAlGe (R = Pr, Ce)

Puphal, Pascal
•
Mielke, Charles
•
Kumar, Neeraj
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February 21, 2019
Physical Review Materials

We explore two methods for single-crystal growth of the theoretically proposed magnetic Weyl semimetals RAlGe (R = Pr, Ce), which prove that a floating-zone technique, being both crucible- and flux-free, is crucial to obtain perfectly stoichiometric RAlGe crystals. In contrast, the crystals grown by a flux-growth technique tend to be Al-rich. We further present both structural and elemental analyses, along with bulk magnetization and electrical resistivity data on the crystals prepared by the floating-zone technique. Both systems with the intended 1:1:1 stoichiometry crystallize in the anticipated polar I4(1) md (No. 109) space group, although neither displays the theoretically expected ferromagnetic ground state. Instead PrAlGe displays a spin-glass-like transition below 16 K with an easy c axis and CeAlGe has an easy-ab-plane antiferromagnetic order below 5 K. The grown crystals provide an ideal platform for microscopic studies of the magnetic field-tunable correlation physics involving magnetism and topological Weyl nodes.

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Type
research article
DOI
10.1103/PhysRevMaterials.3.024204
Web of Science ID

WOS:000459320100001

Author(s)
Puphal, Pascal
•
Mielke, Charles
•
Kumar, Neeraj
•
Soh, Y.  
•
Shang, Tian  
•
Medarde, Marisa
•
White, Jonathan S.
•
Pomjakushina, Ekaterina
Date Issued

2019-02-21

Publisher

AMER PHYSICAL SOC

Published in
Physical Review Materials
Volume

3

Issue

2

Article Number

024204

Subjects

Materials Science, Multidisciplinary

•

Materials Science

•

discovery

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSNS  
Available on Infoscience
June 18, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/157260
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