Structure and magnetic properties of the REAuBi2 (RE=La-Nd, Sm) phases

Elizabeth M. Seibel; Weiwei Xie; Quinn D. Gibson; R. J. Cava

doi:10.1016/j.jssc.2015.07.013

Structure and magnetic properties of the REAuBi₂ (RE=La-Nd, Sm) phases

Elizabeth M. Seibel, Weiwei Xie, Quinn D. Gibson, R. J. Cava

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

We present the crystal structures and basic magnetic properties of the REAuBi₂ (RE=La-Nd, Sm) compounds. This isostructural family crystallizes in the tetragonal P4/nmm (no. 129) HfCuSi₂-type, as determined by single crystal X-ray diffraction. Three distinct substructures are present: an RE layer, a tetrahedral AuBi layer, and a Bi square net layer. Electronic structure calculations indicate that these compounds display bands which cross the Fermi level, derived from both the Bi square net and the covalent AuBi layer. The small size of LaAuBi₂ crystals precluded detailed physical property measurements, whereas large single crystals could be grown for all other phases investigated here. Single crystal measurements of CeAuBi₂, PrAuBi₂, and NdAuBi₂ show overall antiferromagnetic ordering and decreasing magnetic anisotropy with decreasing rare earth size. SmAuBi₂ also shows signatures of magnetic ordering.

Original language	English (US)
Pages (from-to)	318-324
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	230
DOIs	https://doi.org/10.1016/j.jssc.2015.07.013
State	Published - Jul 25 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Keywords

Bismuth square net
Magnetic anisotropy
Rare earth intermetallic

Access to Document

10.1016/j.jssc.2015.07.013

Cite this

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title = "Structure and magnetic properties of the REAuBi2 (RE=La-Nd, Sm) phases",

abstract = "We present the crystal structures and basic magnetic properties of the REAuBi2 (RE=La-Nd, Sm) compounds. This isostructural family crystallizes in the tetragonal P4/nmm (no. 129) HfCuSi2-type, as determined by single crystal X-ray diffraction. Three distinct substructures are present: an RE layer, a tetrahedral AuBi layer, and a Bi square net layer. Electronic structure calculations indicate that these compounds display bands which cross the Fermi level, derived from both the Bi square net and the covalent AuBi layer. The small size of LaAuBi2 crystals precluded detailed physical property measurements, whereas large single crystals could be grown for all other phases investigated here. Single crystal measurements of CeAuBi2, PrAuBi2, and NdAuBi2 show overall antiferromagnetic ordering and decreasing magnetic anisotropy with decreasing rare earth size. SmAuBi2 also shows signatures of magnetic ordering.",

keywords = "Bismuth square net, Magnetic anisotropy, Rare earth intermetallic",

author = "Seibel, {Elizabeth M.} and Weiwei Xie and Gibson, {Quinn D.} and Cava, {R. J.}",

note = "Funding Information: This work was supported by the AFOSR MURI on thermoelectric materials, Grant FA9550-10-1-0553 . The authors thank Dr. Fazel Tafti and Dr. Neel Haldolaarachchige for helpful discussions. ",

year = "2015",

month = jul,

day = "25",

doi = "10.1016/j.jssc.2015.07.013",

language = "English (US)",

volume = "230",

pages = "318--324",

journal = "Journal of Solid State Chemistry",

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AU - Seibel, Elizabeth M.

AU - Xie, Weiwei

AU - Gibson, Quinn D.

AU - Cava, R. J.

N1 - Funding Information: This work was supported by the AFOSR MURI on thermoelectric materials, Grant FA9550-10-1-0553 . The authors thank Dr. Fazel Tafti and Dr. Neel Haldolaarachchige for helpful discussions.

PY - 2015/7/25

Y1 - 2015/7/25

N2 - We present the crystal structures and basic magnetic properties of the REAuBi2 (RE=La-Nd, Sm) compounds. This isostructural family crystallizes in the tetragonal P4/nmm (no. 129) HfCuSi2-type, as determined by single crystal X-ray diffraction. Three distinct substructures are present: an RE layer, a tetrahedral AuBi layer, and a Bi square net layer. Electronic structure calculations indicate that these compounds display bands which cross the Fermi level, derived from both the Bi square net and the covalent AuBi layer. The small size of LaAuBi2 crystals precluded detailed physical property measurements, whereas large single crystals could be grown for all other phases investigated here. Single crystal measurements of CeAuBi2, PrAuBi2, and NdAuBi2 show overall antiferromagnetic ordering and decreasing magnetic anisotropy with decreasing rare earth size. SmAuBi2 also shows signatures of magnetic ordering.

AB - We present the crystal structures and basic magnetic properties of the REAuBi2 (RE=La-Nd, Sm) compounds. This isostructural family crystallizes in the tetragonal P4/nmm (no. 129) HfCuSi2-type, as determined by single crystal X-ray diffraction. Three distinct substructures are present: an RE layer, a tetrahedral AuBi layer, and a Bi square net layer. Electronic structure calculations indicate that these compounds display bands which cross the Fermi level, derived from both the Bi square net and the covalent AuBi layer. The small size of LaAuBi2 crystals precluded detailed physical property measurements, whereas large single crystals could be grown for all other phases investigated here. Single crystal measurements of CeAuBi2, PrAuBi2, and NdAuBi2 show overall antiferromagnetic ordering and decreasing magnetic anisotropy with decreasing rare earth size. SmAuBi2 also shows signatures of magnetic ordering.

KW - Bismuth square net

KW - Magnetic anisotropy

KW - Rare earth intermetallic

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