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Title: Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in Ca 1 - x Sr x Co 2 - y As 2

Abstract

In search of a quantum phase transition between the two-dimensional (2D) ferromagnetism of Ca 1 - x Sr x Co 2 - y As 2 and stripe-type antiferromagnetism in SrCo2As 2, we instead discover evidence for 1D magnetic frustration between magnetic square Co layers. We present neutron-diffraction data for Ca 1 - x Sr x Co 2 - y As 2 that reveal a sequence of $x$-dependent magnetic transitions which involve different stacking of 2D ferromagnetically aligned layers with different magnetic anisotropy. We report on the $x$-dependent changes to the magnetic order by utilizing classical analytical calculations of a 1D Heisenberg model where single-ion magnetic anisotropy and frustration of antiferromagnetic nearest- and next-nearest-layer exchange interactions are all composition dependent.

Authors:
 [1];  [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States); Washington State Univ., Pullman, WA (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1542872
Alternate Identifier(s):
OSTI ID: 1543200; OSTI ID: 1546435
Report Number(s):
IS-J-9975
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC02-07 CH11358; AC2-06 CH11357; AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 2; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Li, Bing, Sizyuk, Y., Sangeetha, N. S., Wilde, J. M., Das, P., Tian, W., Johnston, D. C., Goldman, A. I., Kreyssig, A., Orth, P. P., McQueeney, R. J., and Ueland, B. G. Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in Ca1-xSrxCo2-yAs2. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.024415.
Li, Bing, Sizyuk, Y., Sangeetha, N. S., Wilde, J. M., Das, P., Tian, W., Johnston, D. C., Goldman, A. I., Kreyssig, A., Orth, P. P., McQueeney, R. J., & Ueland, B. G. Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in Ca1-xSrxCo2-yAs2. United States. doi:10.1103/PhysRevB.100.024415.
Li, Bing, Sizyuk, Y., Sangeetha, N. S., Wilde, J. M., Das, P., Tian, W., Johnston, D. C., Goldman, A. I., Kreyssig, A., Orth, P. P., McQueeney, R. J., and Ueland, B. G. Mon . "Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in Ca1-xSrxCo2-yAs2". United States. doi:10.1103/PhysRevB.100.024415.
@article{osti_1542872,
title = {Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in Ca1-xSrxCo2-yAs2},
author = {Li, Bing and Sizyuk, Y. and Sangeetha, N. S. and Wilde, J. M. and Das, P. and Tian, W. and Johnston, D. C. and Goldman, A. I. and Kreyssig, A. and Orth, P. P. and McQueeney, R. J. and Ueland, B. G.},
abstractNote = {In search of a quantum phase transition between the two-dimensional (2D) ferromagnetism of Ca1-xSrxCo2-yAs2 and stripe-type antiferromagnetism in SrCo2As2, we instead discover evidence for 1D magnetic frustration between magnetic square Co layers. We present neutron-diffraction data for Ca1-xSrxCo2-yAs2 that reveal a sequence of $x$-dependent magnetic transitions which involve different stacking of 2D ferromagnetically aligned layers with different magnetic anisotropy. We report on the $x$-dependent changes to the magnetic order by utilizing classical analytical calculations of a 1D Heisenberg model where single-ion magnetic anisotropy and frustration of antiferromagnetic nearest- and next-nearest-layer exchange interactions are all composition dependent.},
doi = {10.1103/PhysRevB.100.024415},
journal = {Physical Review B},
number = 2,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}

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