Local atomic and magnetic structure of dilute magnetic semiconductor (Ba,K)(Zn,Mn)${}_2$As${}_2$

Abstract

We have studied the atomic and magnetic structure of the dilute ferromagnetic semiconductor system (Ba,K)(Zn,Mn)${}_2$As${}_2$ through atomic and magnetic pair distribution function analysis of temperature-dependent x-ray and neutron total scattering data. We detected a change in curvature of the temperature-dependent unit cell volume of the average tetragonal crystallographic structure at a temperature coinciding with the onset of ferromagnetic order. We also observed the existence of a well-defined local orthorhombic structure on a short length scale of $\lesssim 5$ Å, resulting in a rather asymmetrical local environment of the Mn and As ions. Finally, the magnetic PDF revealed ferromagnetic alignment of Mn spins along the crystallographic $c$-axis, with robust nearest-neighbor ferromagnetic correlations that exist even above the ferromagnetic ordering temperature. We discuss these results in the context of other experiments and theoretical studies on this system.

References in corpus (13)

• Dilute ferromagnetic semiconductors: Physics and spintronic structures
• New Diluted ferromagnetic semiconductor Li(Zn,Mn)P with decoupled charge and spin doping
• NMR Investigation of the Diluted Magnetic Semiconductor Li(Zn1-xMnx)P (x = 0.1)
• Local structure study of In_xGa_(1-x)As semiconductor alloys using High Energy Synchrotron X-ray Diffraction
• Theory of Mn-doped I-II-V Semiconductors
• Magnetic structure determination from the magnetic pair distribution function (mPDF): ground state of MnO
• Verification of Anderson superexchange in MnO via magnetic pair distribution function analysis and \textit{ab initio} theory
• Jahn-Teller Distortion and Ferromagnetism in the Dilute Magnetic Semiconductors GaN:Mn
• Photoemission and X-ray Absorption Studies of the Diluted Magnetic Semiconductor Ba${}_{1-y}$K${}_y$(Zn${}_{1-x}$Mn${}_x$)${}_2$As${}_2$ Isostructural to Fe-based Superconductors
• (Ca,Na)(Zn,Mn)2As2: a new spin & charge doping decoupled diluted ferromagnetic semiconductor with hexagonal CaAl2Si2 structure
• Fermi Surfaces and $p$-$d$ Hybridization in the Diluted Magnetic Semiconductor Ba${}_{1-x}$K${}_x$(Zn${}_{1-y}$Mn${}_y$)${}_2$As${}_2$ Studied by Soft X-ray Angle Resolved Photoemission Spectroscopy
• (Sr,Na)(Zn,Mn)2As2: A new diluted ferromagnetic semiconductor with the hexagonal CaAl2Si2 type structure
• On the estimation of statistical uncertainties on powder diffraction and small angle scattering data from 2-D x-ray detectors

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• Local atomic and magnetic structure of multiferroic (Sr,Ba)(Mn,Ti)O${}_3$
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