TY - JOUR
T1 - Mössbauer studies of Ba(Fe1-xNix) 2As2
AU - Nowik, Israel
AU - Feiner, Israel
AU - Ni, Ni
AU - Bud'Ko, Sergey L.
AU - Canfleld, Paul C.
PY - 2010/8/11
Y1 - 2010/8/11
N2 - We present detailed 57Fe Mössbauer effect spectroscopy (MS) measurements at various temperatures for Ba(Fe1-xNix) 2As2. The isomer shift values for all samples are in the range of 0.42 ± 0.02 mm s-1, indicating a typical metallic state of divalent Fe ions. The MS spectra of the magnetic samples (up to x = 0.024) are well reproduced by spin density waves subspectra. Both the magnetic ordering temperatures TM and the average magnetic hyperfine fields H eff, decrease with x. The Heff values scale linearly with TM- For higher x values the samples become superconducting and the MS spectra below and above Tc are almost identical, indicating that the MS technique are not sensitive enough to the superconducting transition.
AB - We present detailed 57Fe Mössbauer effect spectroscopy (MS) measurements at various temperatures for Ba(Fe1-xNix) 2As2. The isomer shift values for all samples are in the range of 0.42 ± 0.02 mm s-1, indicating a typical metallic state of divalent Fe ions. The MS spectra of the magnetic samples (up to x = 0.024) are well reproduced by spin density waves subspectra. Both the magnetic ordering temperatures TM and the average magnetic hyperfine fields H eff, decrease with x. The Heff values scale linearly with TM- For higher x values the samples become superconducting and the MS spectra below and above Tc are almost identical, indicating that the MS technique are not sensitive enough to the superconducting transition.
UR - http://www.scopus.com/inward/record.url?scp=77957012106&partnerID=8YFLogxK
U2 - 10.1088/0953-8984/22/35/355701
DO - 10.1088/0953-8984/22/35/355701
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AN - SCOPUS:77957012106
SN - 0953-8984
VL - 22
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 35
M1 - 355701
ER -