TY - JOUR
T1 - Mössbauer studies of spin density wave-superconducting Fe-As systems
AU - Nowik, I.
AU - Felner, I.
AU - Ren, Z.
AU - Xu, Z. A.
AU - Cao, G. H.
PY - 2010
Y1 - 2010
N2 - The recently discovered new Fe-As based spin density wave superconducting systems are shortly reviewed. Mössbauer studies of EuFe 2-xNixAs2 (x=0.0 to 0.20) by 57Fe and 151Eu isotopes are reported. In pure EuFe2As 2 the iron orders magnetically at 200 K, while the Eu orders antiferromagnetically at 18 K. The 4.2 K studies show hyperfine fields of 8.5 T and 26 T for 57Fe and 151Eu respectively. Ni substitution for iron leads to a decrease in the SDW magnetic transition temperature. This phase transition is below 90 K for x>0.09. For x=0.20, the 151Eu studies at 4.2 K show magnetic order (hyperfine field of 28 T) while the iron displays, no magnetism but only a very small hyperfine field (1.4 T), probably transferred from the now ferromagnetic Eu sublattice.
AB - The recently discovered new Fe-As based spin density wave superconducting systems are shortly reviewed. Mössbauer studies of EuFe 2-xNixAs2 (x=0.0 to 0.20) by 57Fe and 151Eu isotopes are reported. In pure EuFe2As 2 the iron orders magnetically at 200 K, while the Eu orders antiferromagnetically at 18 K. The 4.2 K studies show hyperfine fields of 8.5 T and 26 T for 57Fe and 151Eu respectively. Ni substitution for iron leads to a decrease in the SDW magnetic transition temperature. This phase transition is below 90 K for x>0.09. For x=0.20, the 151Eu studies at 4.2 K show magnetic order (hyperfine field of 28 T) while the iron displays, no magnetism but only a very small hyperfine field (1.4 T), probably transferred from the now ferromagnetic Eu sublattice.
UR - http://www.scopus.com/inward/record.url?scp=77954673565&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/217/1/012121
DO - 10.1088/1742-6596/217/1/012121
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AN - SCOPUS:77954673565
SN - 1742-6588
VL - 217
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012121
T2 - International Conference on the Applications of the Mossbauer Effect, ICAME 2009
Y2 - 19 July 2009 through 24 July 2009
ER -