Local structural variation as source of magnetic moment reduction in BaFe2As2
نویسندگان
چکیده
منابع مشابه
Magnetic Excitation and Thermodynamics of BaFe2As2
Magnetic excitation of the iron-based superconductor parent compound BaFe2As2 at finite temperature are addressed with a first-principles formulation of the Helmholtz energy, which can account for the finite temperature mixture of many magnetic configurations. We find that it is the spin exchange coupling in the interplane c direction that dictates the spin density wave ordering. We have also q...
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Stephen D. Wilson,1 Z. Yamani,2 C. R. Rotundu,1 B. Freelon,3 E. Bourret-Courchesne,1 and R. J. Birgeneau1,3 1Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA 2Chalk River Laboratories, Canadian Neutron Beam Centre, National Research Council, Chalk River, Ontario, Canada K0J 1P0 3Department of Physics, University of California, Berkeley, Californ...
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We report neutron scattering experiments probing the influence of uniaxial strain on both the magnetic and structural order parameters in the parent iron pnictide compound, BaFe2As2. Our data show that modest strain fields along the in-plane orthorhombic b axis can affect significant changes in phase behavior simultaneous to the removal of structural twinning effects. As a result, we demonstrat...
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The recent discovery of iron ferropnictide superconductors has received intensive concern in connection with magnetically involved superconductors. Prominent features of ferropnictide superconductors are becoming apparent: the parent compounds exhibit an antiferromagnetic ordered spin density wave (SDW) state, the magnetic-phase transition is always accompanied by a crystal structural transitio...
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M. D. Vannette,1 S. Yeninas,1 E. Morosan,2 R. J. Cava,3 and R. Prozorov1,* 1Department of Physics & Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA 2Department of Physics & Astronomy, Rice University, Houston, Texas 77005, USA 3Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA Received 18 May 2009; revised manuscript received 6 July 2009...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2012
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.86.174113