Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in Ca1-xSrxCo2-yAs2

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.

doi:10.1103/PhysRevB.100.024415

Antiferromagnetic stacking of ferromagnetic layers and doping-controlled phase competition in ${Ca}_{1 - x} {Sr}_{x} {Co}_{2 - y} {As}_{2}$

Journal Article · Mon Jul 15 00:00:00 EDT 2019 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.100.024415· OSTI ID:1542872

Li, Bing ^[1]; Sizyuk, Y. ^[1]; Sangeetha, N. S. ^[1]; Wilde, J. M. ^[1]; Das, P. ^[2]; Tian, W. ^[3]; Johnston, D. C. ^[1]; Goldman, A. I. ^[1]; Kreyssig, A. ^[1]; Orth, P. P. ^[1]; McQueeney, R. J. ^[1]; Ueland, B. G. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States); Washington State Univ., Pullman, WA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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 SrCo2As₂, 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.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-07CH11358; AC05-00OR22725

OSTI ID:: 1542872

Alternate ID(s):: OSTI ID: 1546435
OSTI ID: 1543200
OSTI ID: 1591892

Report Number(s):: IS-J--9975

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 2 Vol. 100; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (3)

Flat-band magnetism and helical magnetic order in Ni-doped SrCo 2 As 2 Li, Yu; Liu, Zhonghao; Xu, Zhuang Physical Review B, Vol. 100, Issue 9 https://doi.org/10.1103/physrevb.100.094446	journal	September 2019
Non-Fermi-liquid types of behavior associated with a magnetic quantum critical point in Sr ( Co 1 − x Ni x ) 2 As 2 single crystals Sangeetha, N. S.; Wang, L. -L.; Smirnov, A. V. Physical Review B, Vol. 100, Issue 9 https://doi.org/10.1103/physrevb.100.094447	journal	September 2019
Helical magnetic ordering in Sr ( Co 1 − x Ni x ) 2 As 2 Wilde, J. M.; Kreyssig, A.; Vaknin, D. Physical Review B, Vol. 100, Issue 16 https://doi.org/10.1103/physrevb.100.161113	journal	October 2019

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