Nature of the Antiferromagnetic and Nematic Transitions in Sr${}_{1-x}$Ba${}_x$Fe${}_{1.97}$Ni${}_{0.03}$As${}_2$

Abstract

We have systematically studied the antiferromagnetic and nematic transitions in Sr${}_{1-x}$Ba${}_x$Fe${}_{1.97}$Ni${}_{0.03}$As${}_2$ by magnetic susceptibility and uniaxial-pressure resistivity measurements, respectively. The derivatives of the temperature dependence of both magnetic and nematic susceptibilities show clearly sharp peak when the transitions are first-order. Accordingly, we show that while both of the magnetic and nematic transitions change from first-order to second-order with increasing Barium doping level, there is a narrow doping range where the former becomes second-order but the latter remains first-order, which has never been realized before in other systems. Moreover, the antiferromagnetic and nematic transition temperatures become different and the jump of nematic susceptibility becomes small in this intermediate doping range. Our results provide key information on the interplay between magnetic and nematic transitions. Concerning the current debate on the microscopic models for nematicity in iron-based superconductors, these observations agree with the magnetic scenario for an itinerant fermionic model in excellent details.

arXiv comment5 pages, 4 figures

References in corpus (38)

• Nematic order in iron superconductors - who is in the driver's seat?
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• Theory of Electron Nematic Order in LaOFeAs
• Pressure induced superconductivity in CaFe${}_2$As${}_2$
• Ising and Spin orders in Iron-based Superconductors
• Anomalous suppression of the orthorhombic distortion in superconducting Ba[Fe(1-x)Cox]2As2
• Ferro-Orbital Order and Strong Magnetic Anisotropy in the Parent Compounds of Iron-Pnictide Superconductors
• Preemptive nematic order, pseudogap, and orbital order in the iron pnictides
• First order structural phase transition in CaFe${}_2$As${}_2$
• Competition and coexistence of antiferromagnetism and superconductivity in underdoped Ba(Fe0.953Co0.047)2As2
• Anisotropy in the electrical resistivity and susceptibility of superconducting BaFe${}_2$As${}_2$ single crystals
• Orbital-Ordering Induces Structural Phase Transition and the Resistivity Anomaly in Iron Pnictides
• Commensurate Itinerant Antiferromagnetism in BaFe2As2: 75As-NMR Studies on a Self-Flux Grown Single Crystal
• In-plane electronic anisotropy of underdoped "122" Fe-arsenide superconductors revealed by measurements of detwinned single crystals
• Complete pressure dependent phase diagrams for SrFe2As2 and BaFe2As2
• Anisotropic itinerant magnetism and spin fluctuations in BaFe2As2: A neutron scattering study
• Consistent model of magnetism in ferropnictides
• Character of the structural and magnetic phase transitions in the parent and electron doped BaFe2As2 compounds
• Anisotropic in-plane resistivity in the nematic phase of the iron pnictides
• The nature of the magnetic and structural phase transitions in BaFe${}_2$As${}_2$
• Effect of uniaxial strain on the structural and magnetic phase transitions in BaFe${}_2$As${}_2$
• Coexistence and competition of the short-range incommensurate antiferromagnetic order with superconductivity in BaFe2-xNixAs2
• Avoided quantum criticality and magnetoelastic coupling in BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Global Phase Diagram for Magnetism and Lattice Distortion of Fe-pnictide Materials
• Correlation effects of exchange splitting and coexistence of spin-density-wave and superconductivity in single crystalline Sr1-xKxFe2As2
• Heat capacity study of BaFe${}_2$As${}_2$: effects of annealing
• First and second order magnetic and structural transitions in BaFe${}_{2(1-x)}$Co${}_{2x}$As${}_2$
• Nematic Quantum Critical Fluctuations in BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Dimensional crossover in the quasi-two-dimensional Ising-O(3) model
• Impact of Uniaxial Pressure on Structural and Magnetic Phase Transitions in Electron-Doped Iron Pnictides
• Uniaxial pressure effect on structural and magnetic phase transitions in NaFeAs and its comparison with as-grown and annealed BaFe${}_2$As${}_2$
• Magnetic order in orbital models of the iron pnictides
• Phase transitions in spin-orbital models with spin-space anisotropies for iron-pnictides: A study through Monte Carlo simulations
• Effect of nematic order on the low-energy spin fluctuations in detwinned BaFe${}_{1.935}$Ni${}_{0.065}$As${}_2$
• The evolution of antiferromagnetic susceptibility to uniaxial pressure in Ba(Fe{1-x}Co{x})2As2
• Elementary Excitations due to Orbital Degrees of Freedom in Iron Based Superconductors
• Nature of the Antiferromagnetic and Nematic Transitions in Sr${}_{1-x}$Ba${}_x$Fe${}_{1.97}$Ni${}_{0.03}$As${}_2$
• Temperature-composition Phase Diagrams for Ba1-xSrxFe2As2 and Ba0.5Sr0.5(Fe1-yCoy)2As2

Cited by in corpus (6)

• Unified phase diagram for iron-based superconductors
• Doping effects of Cr on the physical properties of BaFe${}_{1.9-x}$Ni${}_{0.1}$Cr${}_x$As${}_2$
• Nature of the Antiferromagnetic and Nematic Transitions in Sr${}_{1-x}$Ba${}_x$Fe${}_{1.97}$Ni${}_{0.03}$As${}_2$
• Nematic fluctuations in the non-superconducting iron pnictide BaFe${}_{1.9-x}$Ni${}_{0.1}$Cr${}_x$As${}_2$
• Tracking the nematicity in cuprate superconductors: a resistivity study under uniaxial pressure
• Crystal growth and characterization of a hole-doped iron-based superconductor Ba(Fe${}_{0.875}$Ti${}_{0.125}$)${}_2$As${}_2$