Synthesis, structure, and physical properties of Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) 13-x

W. Adam Phelan; Michael J. Kangas; Gregory T. McCandless; Brenton L. Drake; Neel Haldolaarachchige; Liang L. Zhao; Jiakui K. Wang; Xiaoping P. Wang; David P. Young; Emilia Morosan; Christina Hoffmann; Julia Y. Chan

doi:10.1021/ic301024t

Synthesis, structure, and physical properties of Ln(Cu,Al,Ga) _13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) _13-x

W. Adam Phelan
, Michael J. Kangas
, Gregory T. McCandless
, Brenton L. Drake
, Neel Haldolaarachchige
, Liang L. Zhao
, Jiakui K. Wang
, Xiaoping P. Wang
, David P. Young
, Emilia Morosan
, Christina Hoffmann
, Julia Y. Chan

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

4 Scopus citations

Abstract

Ln(Cu,Al,Ga) _13-x (Ln = La-Pr, and Eu; x ∼ 0.2) were synthesized by a combined Al/Ga flux. Single crystal X-ray and neutron diffraction experiments revealed that these compounds crystallize in the NaZn ₁₃ structure-type (space group Fm3̄c) with lattice parameters of a ∼ 12 Å, V ∼ 1600 Å, and Z ∼ 8. Our final neutron models led us to conclude that Cu is occupationally disordered on the 8b Wyckoff site while Cu, Al, and Ga are substitutionally disordered on the 96i Wyckoff site of this well-known structure-type. The magnetic susceptibility data show that Ce(Cu,Al,Ga) _13-x and Pr(Cu,Al,Ga) _13-x exhibit paramagnetic behavior down to the lowest temperatures measured while Eu(Cu,Al,Ga) _13-x displays ferromagnetic behavior below 6 K. Eu(Cu,Al) _13-x was prepared via arc-melting and orders ferromagnetically below 8 K. The magnetocaloric properties of Eu(Cu,Al,Ga) _13-x and Eu(Cu,Al) _13-x were measured and compared. Additionally, an enhanced value of the Sommerfeld coefficient (γ = 356 mJ/mol-K ²) was determined for Pr(Cu,Al,Ga) _13-x. Herein, we present the synthesis, structural refinement details, and physical properties of Ln(Cu,Al,Ga) _13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) _13-x.

Original language	English
Pages (from-to)	10193-10202
Number of pages	10
Journal	Inorganic Chemistry
Volume	51
Issue number	19
DOIs	https://doi.org/10.1021/ic301024t
State	Published - Oct 1 2012

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10.1021/ic301024t

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Phelan, W. A., Kangas, M. J., McCandless, G. T., Drake, B. L., Haldolaarachchige, N., Zhao, L. L., Wang, J. K., Wang, X. P., Young, D. P., Morosan, E., Hoffmann, C., & Chan, J. Y. (2012). Synthesis, structure, and physical properties of Ln(Cu,Al,Ga) _13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) _13-x Inorganic Chemistry, 51(19), 10193-10202. https://doi.org/10.1021/ic301024t

@article{6fd1d46bc23e4dfb8911155bd5d24ec4,

title = "Synthesis, structure, and physical properties of Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) 13-x ",

abstract = "Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu; x ∼ 0.2) were synthesized by a combined Al/Ga flux. Single crystal X-ray and neutron diffraction experiments revealed that these compounds crystallize in the NaZn 13 structure-type (space group Fm{\=3}c) with lattice parameters of a ∼ 12 {\AA}, V ∼ 1600 {\AA}, and Z ∼ 8. Our final neutron models led us to conclude that Cu is occupationally disordered on the 8b Wyckoff site while Cu, Al, and Ga are substitutionally disordered on the 96i Wyckoff site of this well-known structure-type. The magnetic susceptibility data show that Ce(Cu,Al,Ga) 13-x and Pr(Cu,Al,Ga) 13-x exhibit paramagnetic behavior down to the lowest temperatures measured while Eu(Cu,Al,Ga) 13-x displays ferromagnetic behavior below 6 K. Eu(Cu,Al) 13-x was prepared via arc-melting and orders ferromagnetically below 8 K. The magnetocaloric properties of Eu(Cu,Al,Ga) 13-x and Eu(Cu,Al) 13-x were measured and compared. Additionally, an enhanced value of the Sommerfeld coefficient (γ = 356 mJ/mol-K 2) was determined for Pr(Cu,Al,Ga) 13-x. Herein, we present the synthesis, structural refinement details, and physical properties of Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) 13-x.",

author = "Phelan, \{W. Adam\} and Kangas, \{Michael J.\} and McCandless, \{Gregory T.\} and Drake, \{Brenton L.\} and Neel Haldolaarachchige and Zhao, \{Liang L.\} and Wang, \{Jiakui K.\} and Wang, \{Xiaoping P.\} and Young, \{David P.\} and Emilia Morosan and Christina Hoffmann and Chan, \{Julia Y.\}",

year = "2012",

month = oct,

day = "1",

doi = "10.1021/ic301024t",

language = "English",

volume = "51",

pages = "10193--10202",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "19",

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TY - JOUR

T1 - Synthesis, structure, and physical properties of Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) 13-x

AU - Phelan, W. Adam

AU - Kangas, Michael J.

AU - McCandless, Gregory T.

AU - Drake, Brenton L.

AU - Haldolaarachchige, Neel

AU - Zhao, Liang L.

AU - Wang, Jiakui K.

AU - Wang, Xiaoping P.

AU - Young, David P.

AU - Morosan, Emilia

AU - Hoffmann, Christina

AU - Chan, Julia Y.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu; x ∼ 0.2) were synthesized by a combined Al/Ga flux. Single crystal X-ray and neutron diffraction experiments revealed that these compounds crystallize in the NaZn 13 structure-type (space group Fm3̄c) with lattice parameters of a ∼ 12 Å, V ∼ 1600 Å, and Z ∼ 8. Our final neutron models led us to conclude that Cu is occupationally disordered on the 8b Wyckoff site while Cu, Al, and Ga are substitutionally disordered on the 96i Wyckoff site of this well-known structure-type. The magnetic susceptibility data show that Ce(Cu,Al,Ga) 13-x and Pr(Cu,Al,Ga) 13-x exhibit paramagnetic behavior down to the lowest temperatures measured while Eu(Cu,Al,Ga) 13-x displays ferromagnetic behavior below 6 K. Eu(Cu,Al) 13-x was prepared via arc-melting and orders ferromagnetically below 8 K. The magnetocaloric properties of Eu(Cu,Al,Ga) 13-x and Eu(Cu,Al) 13-x were measured and compared. Additionally, an enhanced value of the Sommerfeld coefficient (γ = 356 mJ/mol-K 2) was determined for Pr(Cu,Al,Ga) 13-x. Herein, we present the synthesis, structural refinement details, and physical properties of Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) 13-x.

AB - Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu; x ∼ 0.2) were synthesized by a combined Al/Ga flux. Single crystal X-ray and neutron diffraction experiments revealed that these compounds crystallize in the NaZn 13 structure-type (space group Fm3̄c) with lattice parameters of a ∼ 12 Å, V ∼ 1600 Å, and Z ∼ 8. Our final neutron models led us to conclude that Cu is occupationally disordered on the 8b Wyckoff site while Cu, Al, and Ga are substitutionally disordered on the 96i Wyckoff site of this well-known structure-type. The magnetic susceptibility data show that Ce(Cu,Al,Ga) 13-x and Pr(Cu,Al,Ga) 13-x exhibit paramagnetic behavior down to the lowest temperatures measured while Eu(Cu,Al,Ga) 13-x displays ferromagnetic behavior below 6 K. Eu(Cu,Al) 13-x was prepared via arc-melting and orders ferromagnetically below 8 K. The magnetocaloric properties of Eu(Cu,Al,Ga) 13-x and Eu(Cu,Al) 13-x were measured and compared. Additionally, an enhanced value of the Sommerfeld coefficient (γ = 356 mJ/mol-K 2) was determined for Pr(Cu,Al,Ga) 13-x. Herein, we present the synthesis, structural refinement details, and physical properties of Ln(Cu,Al,Ga) 13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) 13-x.

UR - https://www.scopus.com/pages/publications/84868092095

U2 - 10.1021/ic301024t

DO - 10.1021/ic301024t

M3 - Article

AN - SCOPUS:84868092095

SN - 0020-1669

VL - 51

SP - 10193

EP - 10202

JO - Inorganic Chemistry

JF - Inorganic Chemistry

IS - 19

ER -

Synthesis, structure, and physical properties of Ln(Cu,Al,Ga) _13-x (Ln = La-Pr, and Eu) and Eu(Cu,Al) _13-x

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