Suppression of magnetic order in CaCo1.86As2 with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co1-xFex)yAs2

W. T. Jayasekara; Abhishek Pandey; A. Kreyssig; N. S. Sangeetha; A. Sapkota; K. Kothapalli; V. K. Anand; W. Tian; D. Vaknin; D. C. Johnston; R. J. McQueeney; A. I. Goldman; B. G. Ueland

doi:10.1103/PhysRevB.95.064425

Suppression of magnetic order in CaCo1.86As2 with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co1-xFex)yAs2

W. T. Jayasekara
, Abhishek Pandey
, A. Kreyssig
, N. S. Sangeetha
, A. Sapkota
, K. Kothapalli
, V. K. Anand
, W. Tian
, D. Vaknin
, D. C. Johnston
, R. J. McQueeney
, A. I. Goldman
, B. G. Ueland

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

13 Scopus citations

Abstract

Magnetization, neutron diffraction, and high-energy x-ray diffraction results for Sn-flux grown single-crystal samples of Ca(Co1-xFex)yAs2, 0≤x≤1, 1.86≤y≤2, are presented and reveal that A-type antiferromagnetic order, with ordered moments lying along the c axis, persists for x 0.12(1). The antiferromagnetic order is smoothly suppressed with increasing x, with both the ordered moment and Néel temperature linearly decreasing. Stripe-type antiferromagnetic order does not occur for x≤0.25, nor does ferromagnetic order for x up to at least x=0.104, and a smooth crossover from the collapsed-tetragonal (cT) phase of CaCo1.86As2 to the tetragonal (T) phase of CaFe2As2 occurs. These results suggest that hole doping CaCo1.86As2 has a less dramatic effect on the magnetism and structure than steric effects due to substituting Sr for Ca.

Original language	English
Article number	064425
Journal	Physical Review B
Volume	95
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.95.064425
State	Published - Feb 23 2017

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Jayasekara, W. T., Pandey, A., Kreyssig, A., Sangeetha, N. S., Sapkota, A., Kothapalli, K., Anand, V. K., Tian, W., Vaknin, D., Johnston, D. C., McQueeney, R. J., Goldman, A. I., & Ueland, B. G. (2017). Suppression of magnetic order in CaCo1.86As2 with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co1-xFex)yAs2. Physical Review B, 95(6), Article 064425. https://doi.org/10.1103/PhysRevB.95.064425

@article{c6289bd4cf984b5e981cd72df1f8d0a3,

title = "Suppression of magnetic order in CaCo1.86As2 with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co1-xFex)yAs2",

abstract = "Magnetization, neutron diffraction, and high-energy x-ray diffraction results for Sn-flux grown single-crystal samples of Ca(Co1-xFex)yAs2, 0≤x≤1, 1.86≤y≤2, are presented and reveal that A-type antiferromagnetic order, with ordered moments lying along the c axis, persists for x 0.12(1). The antiferromagnetic order is smoothly suppressed with increasing x, with both the ordered moment and N{\'e}el temperature linearly decreasing. Stripe-type antiferromagnetic order does not occur for x≤0.25, nor does ferromagnetic order for x up to at least x=0.104, and a smooth crossover from the collapsed-tetragonal (cT) phase of CaCo1.86As2 to the tetragonal (T) phase of CaFe2As2 occurs. These results suggest that hole doping CaCo1.86As2 has a less dramatic effect on the magnetism and structure than steric effects due to substituting Sr for Ca.",

author = "Jayasekara, \{W. T.\} and Abhishek Pandey and A. Kreyssig and Sangeetha, \{N. S.\} and A. Sapkota and K. Kothapalli and Anand, \{V. K.\} and W. Tian and D. Vaknin and Johnston, \{D. C.\} and McQueeney, \{R. J.\} and Goldman, \{A. I.\} and Ueland, \{B. G.\}",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = feb,

day = "23",

doi = "10.1103/PhysRevB.95.064425",

language = "English",

volume = "95",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "6",

}

Jayasekara, WT, Pandey, A, Kreyssig, A, Sangeetha, NS, Sapkota, A, Kothapalli, K, Anand, VK, Tian, W, Vaknin, D, Johnston, DC, McQueeney, RJ, Goldman, AI & Ueland, BG 2017, 'Suppression of magnetic order in CaCo1.86As2 with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co1-xFex)yAs2', Physical Review B, vol. 95, no. 6, 064425. https://doi.org/10.1103/PhysRevB.95.064425

TY - JOUR

T1 - Suppression of magnetic order in CaCo1.86As2 with Fe substitution

T2 - Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co1-xFex)yAs2

AU - Jayasekara, W. T.

AU - Pandey, Abhishek

AU - Kreyssig, A.

AU - Sangeetha, N. S.

AU - Sapkota, A.

AU - Kothapalli, K.

AU - Anand, V. K.

AU - Tian, W.

AU - Vaknin, D.

AU - Johnston, D. C.

AU - McQueeney, R. J.

AU - Goldman, A. I.

AU - Ueland, B. G.

PY - 2017/2/23

Y1 - 2017/2/23

N2 - Magnetization, neutron diffraction, and high-energy x-ray diffraction results for Sn-flux grown single-crystal samples of Ca(Co1-xFex)yAs2, 0≤x≤1, 1.86≤y≤2, are presented and reveal that A-type antiferromagnetic order, with ordered moments lying along the c axis, persists for x 0.12(1). The antiferromagnetic order is smoothly suppressed with increasing x, with both the ordered moment and Néel temperature linearly decreasing. Stripe-type antiferromagnetic order does not occur for x≤0.25, nor does ferromagnetic order for x up to at least x=0.104, and a smooth crossover from the collapsed-tetragonal (cT) phase of CaCo1.86As2 to the tetragonal (T) phase of CaFe2As2 occurs. These results suggest that hole doping CaCo1.86As2 has a less dramatic effect on the magnetism and structure than steric effects due to substituting Sr for Ca.

AB - Magnetization, neutron diffraction, and high-energy x-ray diffraction results for Sn-flux grown single-crystal samples of Ca(Co1-xFex)yAs2, 0≤x≤1, 1.86≤y≤2, are presented and reveal that A-type antiferromagnetic order, with ordered moments lying along the c axis, persists for x 0.12(1). The antiferromagnetic order is smoothly suppressed with increasing x, with both the ordered moment and Néel temperature linearly decreasing. Stripe-type antiferromagnetic order does not occur for x≤0.25, nor does ferromagnetic order for x up to at least x=0.104, and a smooth crossover from the collapsed-tetragonal (cT) phase of CaCo1.86As2 to the tetragonal (T) phase of CaFe2As2 occurs. These results suggest that hole doping CaCo1.86As2 has a less dramatic effect on the magnetism and structure than steric effects due to substituting Sr for Ca.

UR - https://www.scopus.com/pages/publications/85014518854

U2 - 10.1103/PhysRevB.95.064425

DO - 10.1103/PhysRevB.95.064425

M3 - Article

AN - SCOPUS:85014518854

SN - 2469-9950

VL - 95

JO - Physical Review B

JF - Physical Review B

IS - 6

M1 - 064425

ER -

Suppression of magnetic order in CaCo1.86As2 with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co1-xFex)yAs2

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