Local atomic and magnetic structure of dilute magnetic semiconductor(Ba,K)(Zn,Mn)2As2

Abstract

We have studied the atomic and magnetic structure of the dilute ferromagnetic semiconductor system (Ba,K)(Zn,Mn)2As2 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 5Å, 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. arXiv:1608.02684v1 [cond-mat.str-el]

Single Crystal Growth and Spin Polarization Measurements of Diluted Magnetic Semiconductor (BaK)(ZnMn)2As2

“…24 A robust nearest-neighbor ferromagnetic correlation that exists above the ferromagnetic ordering temperature suggested potential to realize even higher Tc in further study. 25 Angle-resolved photoemission spectroscopy (ARPES) measurements showed clear impurity band of doping Mn well below the Fermi energy. [26][27] Besides, the excellent match of lattice parameters (within 5% mismatch) among "122" type DMS (Ba,K)(Zn,Mn) 2 As 2 , "122" iron-based superconductor (Ba,K)Fe 2 As 2 , and antiferromagnetic BaMn 2 As 2 is promising for fabricating heterojunctions with different types of ordering.…”

Out-of-plane easy-axis in thin films of diluted magnetic semiconductor Ba1−xKx(Zn1−yMny)2As2

“…In this respect, as a result of 20 years heavy investigation, record T c of (Ga,Mn)As film has been boosted from the initial 75 K 1 to ∼185 K until now. 4 Very recently Mn-doped ZnAs-based DMS materials [5][6][7][8][9][10][11] emerged, providing an alternative to study on new DMS thin films possessing better properties, especially under the circumstances that preliminary evidences in the bulk reported possible T c up to 230 K. 12 In this paper we deposited and studied the properties of the Ba 1x K x (Zn 1y Mn y ) 2 As 2 (BKZMA) (x = 0.03, 0.08; y = 0.15) DMS films for the first time. Over 320 films have been studied.…”

Magnetic Pair Distribution Function of Spin-glass System Mn0.5Fe0.5TiO3

“…The local magnetic structural analyses have been performed on antiferromagnetic MnO, the diluted magnetic semiconductor (Ba,K)(Zn,Mn) 2 As 2 and the frustrated spin systems NaCaCo 2 F 7 and NaSrCo 2 F 7 [21][22][23]. In these analyses, the neutron scattering intensity including both nuclear and magnetic components which is normalized by nuclear scattering lengths are transformed to PDF.…”