Crystal and magnetic structure of CaCo1.86As2 studied by x-ray and neutron diffraction

D. G. Quirinale; V. K. Anand; M. G. Kim; Abhishek Pandey; A. Huq; P. W. Stephens; T. W. Heitmann; A. Kreyssig; R. J. McQueeney; D. C. Johnston; A. I. Goldman

doi:10.1103/PhysRevB.88.174420

Crystal and magnetic structure of CaCo_1.86As₂ studied by x-ray and neutron diffraction

D. G. Quirinale
, V. K. Anand
, M. G. Kim
, Abhishek Pandey
, A. Huq
, P. W. Stephens
, T. W. Heitmann
, A. Kreyssig
, R. J. McQueeney
, D. C. Johnston
, A. I. Goldman

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

51 Scopus citations

Abstract

Neutron and x-ray diffraction measurements are presented for powders and single crystals of CaCo₂As₂. The crystal structure is a collapsed-tetragonal ThCr₂Si₂-type structure as previously reported, but with 7(1)% vacancies on the Co sites corresponding to the composition CaCo_1.86(2)As₂. The thermal expansion coefficients for both the a and c axes are positive from 10 to 300 K. Neutron diffraction measurements on single crystals demonstrate the onset of A-type collinear antiferromagnetic order below the Néel temperature T _N=52(1) K with the ordered moments directed along the tetragonal c axis, aligned ferromagnetically in the ab plane and antiferromagnetically stacked along the c axis.

Original language	English
Article number	174420
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	88
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.88.174420
State	Published - Nov 25 2013
Externally published	Yes

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Quirinale, D. G., Anand, V. K., Kim, M. G., Pandey, A., Huq, A., Stephens, P. W., Heitmann, T. W., Kreyssig, A., McQueeney, R. J., Johnston, D. C., & Goldman, A. I. (2013). Crystal and magnetic structure of CaCo_1.86As₂ studied by x-ray and neutron diffraction. Physical Review B - Condensed Matter and Materials Physics, 88(17), Article 174420. https://doi.org/10.1103/PhysRevB.88.174420

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title = "Crystal and magnetic structure of CaCo1.86As2 studied by x-ray and neutron diffraction",

abstract = "Neutron and x-ray diffraction measurements are presented for powders and single crystals of CaCo2As2. The crystal structure is a collapsed-tetragonal ThCr2Si2-type structure as previously reported, but with 7(1)\% vacancies on the Co sites corresponding to the composition CaCo1.86(2)As2. The thermal expansion coefficients for both the a and c axes are positive from 10 to 300 K. Neutron diffraction measurements on single crystals demonstrate the onset of A-type collinear antiferromagnetic order below the N{\'e}el temperature T N=52(1) K with the ordered moments directed along the tetragonal c axis, aligned ferromagnetically in the ab plane and antiferromagnetically stacked along the c axis.",

author = "Quirinale, \{D. G.\} and Anand, \{V. K.\} and Kim, \{M. G.\} and Abhishek Pandey and A. Huq and Stephens, \{P. W.\} and Heitmann, \{T. W.\} and A. Kreyssig and McQueeney, \{R. J.\} and Johnston, \{D. C.\} and Goldman, \{A. I.\}",

year = "2013",

month = nov,

day = "25",

doi = "10.1103/PhysRevB.88.174420",

language = "English",

volume = "88",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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T1 - Crystal and magnetic structure of CaCo1.86As2 studied by x-ray and neutron diffraction

AU - Quirinale, D. G.

AU - Anand, V. K.

AU - Kim, M. G.

AU - Pandey, Abhishek

AU - Huq, A.

AU - Stephens, P. W.

AU - Heitmann, T. W.

AU - Kreyssig, A.

AU - McQueeney, R. J.

AU - Johnston, D. C.

AU - Goldman, A. I.

PY - 2013/11/25

Y1 - 2013/11/25

N2 - Neutron and x-ray diffraction measurements are presented for powders and single crystals of CaCo2As2. The crystal structure is a collapsed-tetragonal ThCr2Si2-type structure as previously reported, but with 7(1)% vacancies on the Co sites corresponding to the composition CaCo1.86(2)As2. The thermal expansion coefficients for both the a and c axes are positive from 10 to 300 K. Neutron diffraction measurements on single crystals demonstrate the onset of A-type collinear antiferromagnetic order below the Néel temperature T N=52(1) K with the ordered moments directed along the tetragonal c axis, aligned ferromagnetically in the ab plane and antiferromagnetically stacked along the c axis.

AB - Neutron and x-ray diffraction measurements are presented for powders and single crystals of CaCo2As2. The crystal structure is a collapsed-tetragonal ThCr2Si2-type structure as previously reported, but with 7(1)% vacancies on the Co sites corresponding to the composition CaCo1.86(2)As2. The thermal expansion coefficients for both the a and c axes are positive from 10 to 300 K. Neutron diffraction measurements on single crystals demonstrate the onset of A-type collinear antiferromagnetic order below the Néel temperature T N=52(1) K with the ordered moments directed along the tetragonal c axis, aligned ferromagnetically in the ab plane and antiferromagnetically stacked along the c axis.

UR - https://www.scopus.com/pages/publications/84888324457

U2 - 10.1103/PhysRevB.88.174420

DO - 10.1103/PhysRevB.88.174420

M3 - Article

AN - SCOPUS:84888324457

SN - 1098-0121

VL - 88

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 17

M1 - 174420

ER -

Crystal and magnetic structure of CaCo_1.86As₂ studied by x-ray and neutron diffraction

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