Anomalous Composition-Induced Crossover in the Magnetic Properties of the Itinerant-Electron Antiferromagnet Ca{1-x}Sr{x}Co{2-y}As{2}

Abstract

The inference of Ying et al. [EPL 104, 67005 (2013)] of a composition-induced change from c-axis ordered-moment alignment in a collinear A-type antiferromagnetic (AFM) structure (AFMI) at small x to ab-plane alignment in an unknown AFM structure (AFMII) at larger x in Ca(1-x)Sr(x)Co(2-y)As(2) with the body-centered tetragonal ThCr2Si2 structure is confirmed. Our major finding is an anomalous magnetic behavior in the crossover region 0.2 < x < 0.3 between these two phases. In this region the magnetic susceptibility versus temperature chi_ab(T) measured with magnetic fields H applied in the ab plane exhibit typical AFM behaviors with cusps at the Neel temperatures of about 65 K, whereas chi_c(T) and the low-temperature isothermal magnetization M_c(H) with H aligned along the c axis exhibit extremely soft ferromagnetic-like behaviors.

arXiv comment6 pages and 5 figures, plus 26 pages and 26 figures of Supplemental Information

References in corpus (33)

• The Puzzle of High Temperature Superconductivity in Layered Iron Pnictides and Chalcogenides
• Superconductivity in Iron Compounds
• Nematic order in iron superconductors - who is in the driver's seat?
• Antiferromagnetic order and spin dynamics in iron-based superconductors
• The Unexpected Properties of Alkali Metal Iron Selenide Superconductors
• Magnetically-Driven Suppression of Nematic Order in an Iron-Based Superconductor
• Superconductivity-induced reentrance of orthorhombic distortion in Ba1-xKxFe2As2
• Double-Q spin-density wave in iron arsenide superconductors
• Unified Molecular Field Theory for Collinear and Noncollinear Heisenberg Antiferromagnets
• Magnetic Susceptibility of Collinear and Noncollinear Heisenberg Antiferromagnets
• Magnetic Dipole Interactions in Crystals
• Crystallographic, Electronic, Thermal and Magnetic Properties of Single-Crystal SrCo2As2
• Spin reorientation in Na-doped BaFe${}_2$As${}_2$ studied by neutron diffraction
• Crystal Growth and Physical Properties of SrCu2As2, SrCu2Sb2 and BaCu2Sb2
• Two successive field-induced spin-flop transitions in single-crystalline CaCo${}_2$As${}_2$
• Competing magnetic double-Q phases and superconductivity-induced re-entrance of C2 magnetic stripe order in iron pnictides
• Vestigial chiral and charge orders from bidirectional spin-density waves: Application to the iron-based superconductors
• Stripe Antiferromagnetic Spin Fluctuations in SrCo${}_2$As${}_2$
• Spin reorientation driven by the interplay between spin-orbit coupling and Hund's rule coupling in iron pnictides
• Crystal and Magnetic Structure of CaCo{1.86}As2 Studied by X-ray and Neutron Diffraction
• Electronic properties of 3d transitional metal pnictides : A comparative study by optical spectroscopy
• Physical Properties of Metallic Antiferromagnetic CaCo{1.86}As2 Single Crystals
• EuCo2P2: A Model Molecular-Field Helical Heisenberg Antiferromagnet
• Detailed magnetic and structural analysis mapping a robust magnetic C4 dome in Sr1-xNaxFe2As2
• Metamagnetic transition in Ca${}_{1-x}$Sr${}_x$Co${}_2$As${}_2$($x$ = 0 and 0.1) single crystals
• Disorder-promoted $C_4$-symmetric magnetic order in iron-based superconductors
• Muon-spin-rotation study of the magnetic structure in the tetragonal antiferromagnetic state of weakly underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Infrared study of the spin reorientation transition and its reversal in the superconducting state in underdoped Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$
• Spin-flop transition and magnetic phase diagram in CaCo${}_2$As${}_2$ revealed by torque measurements
• Collective magnetic excitations of $C_4$ symmetric magnetic states in iron-based superconductors
• Suppression of magnetic order in CaCo${}_{1.86}$As${}_2$ with Fe substitution: Magnetization, neutron diffraction, and x-ray diffraction studies of Ca(Co${}_{1-x}$Fe${}_x$)${}_y$As${}_2$
• EuCo2P2: A Model Molecular-Field Helical Heisenberg Antiferromagnet
• Interplay between tetragonal magnetic order, stripe magnetism, and superconductivity in iron-based materials

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