Frandsen, Benjamin A.
[Author];
Gong, Zizhou
[Author];
Terban, Maxwell W.
[Author];
Banerjee, Soham
[Author];
Chen, Bijuan
[Author];
Jin, Changqing
[Author];
Feygenson, Mikhail
[Author];
Uemura, Yasutomo J.
[Author];
Billinge, Simon J. L.
[Author]
Local atomic and magnetic structure of dilute magnetic semiconductor (Ba , K) (Zn , Mn)$_{2}$ As$_{2}$
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Media type:
E-Article
Title:
Local atomic and magnetic structure of dilute magnetic semiconductor (Ba , K) (Zn , Mn)$_{2}$ As$_{2}$
Contributor:
Frandsen, Benjamin A.
[Author];
Gong, Zizhou
[Author];
Terban, Maxwell W.
[Author];
Banerjee, Soham
[Author];
Chen, Bijuan
[Author];
Jin, Changqing
[Author];
Feygenson, Mikhail
[Author];
Uemura, Yasutomo J.
[Author];
Billinge, Simon J. L.
[Author]
imprint:
Inst., 2016
Published in:Physical review / B 94(9), 094102 (2016). doi:10.1103/PhysRevB.94.094102
Footnote:
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Description:
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.