Local moments and symmetry breaking in metallic PrMnSbO

Abstract

We report a combined experimental and theoretical investigation of the layered antimonide PrMnSbO which is isostructural to the parent phase of the iron pnictide superconductors. We find linear resistivity near room temperature and Fermi liquid-like T^{2} behaviour below 150 K. Neutron powder diffraction shows that unfrustrated C-type Mn magnetic order develops below \sim 230 K, followed by a spin-flop coupled to induced Pr order. At T \sim 35 K, we find a tetragonal to orthorhombic (T-O) transition. First principles calculations show that the large magnetic moments observed in this metallic compound are of local origin. Our results are thus inconsistent with either the itinerant or frustrated models proposed for symmetry breaking in the iron pnictides. We show that PrMnSbO is instead a rare example of a metal where structural distortions are driven by f-electron degrees of freedom.

References in corpus (7)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Origin of the ~150 K Anomaly in LaOFeAs; Competing Antiferromagnetic Superexchange Interactions, Frustration, and Structural Phase Transition
• Quantum oscillations in the parent magnetic phase of an iron arsenide high temperature superconductor
• Electronic structure and Magnetism in BaMn${}_2$As${}_2$ and BaMn${}_2$Sb${}_2$
• Magnetic Ordering and Negative Thermal Expansion in PrFeAsO
• CeFePO: A Heavy Fermion Metal with Ferromagnetic Correlations
• Itinerant Nature of Magnetism in Iron Pnictides: A first principles study

Cited by in corpus (7)

• Analysis of model parameter dependences on the second-order nonlinear conductivity in $\mathcal{P}\mathcal{T}$-symmetric collinear antiferromagnetic metals with magnetic toroidal moment on zigzag chains
• Nd induced Mn spin-reorientation transition in NdMnAsO
• Symmetry analysis of current-induced switching of antiferromagnets
• Spin reorientation and Ce-Mn coupling in antiferromagnetic oxypnictide CeMnAsO
• Absence of Colossal Magnetoresistance in the Oxypnictide PrMnAsO0.95F0.05
• Tuning quantum transport by controlling spin reorientations in Dirac semimetal candidates Eu${}_{1-x}$Sr${}_x$MnSb${}_2$
• Chemistry and physics of layered oxychalcogenides containing an anti-cuprate type square lattice