TY - JOUR
T1 - Local structural variation as source of magnetic moment reduction in BaFe2As2
AU - Niedziela, Jennifer L.
AU - McGuire, M. A.
AU - Egami, T.
PY - 2012/11/26
Y1 - 2012/11/26
N2 - We report time-of-flight neutron powder diffraction results on stoichiometric BaFe2As2. Pair distribution function analysis shows that the orthorhombic distortion in the a-b plane at short distances are significantly different from the average lattice distortion, indicating local variations in the lattice at short range. We propose that this local variation reflects a high density of nanotwins, short-ranged structures which locally affect the magnetic alignment. This result suggests that the discrepancies between the observed and calculated magnetic moments in BaFe 2As2 arise partly from short-ranged variation of the lattice in the a-b plane.
AB - We report time-of-flight neutron powder diffraction results on stoichiometric BaFe2As2. Pair distribution function analysis shows that the orthorhombic distortion in the a-b plane at short distances are significantly different from the average lattice distortion, indicating local variations in the lattice at short range. We propose that this local variation reflects a high density of nanotwins, short-ranged structures which locally affect the magnetic alignment. This result suggests that the discrepancies between the observed and calculated magnetic moments in BaFe 2As2 arise partly from short-ranged variation of the lattice in the a-b plane.
UR - http://www.scopus.com/inward/record.url?scp=84870438923&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.86.174113
DO - 10.1103/PhysRevB.86.174113
M3 - Article
AN - SCOPUS:84870438923
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 17
M1 - 174113
ER -