TY - JOUR
T1 - 57Fe Mössbauer spectroscopy studies of CaFe 4As 3
AU - Nowik, I.
AU - Felner, I.
AU - Karki, A. B.
AU - Jin, R.
PY - 2011/12/7
Y1 - 2011/12/7
N2 - We report on the 57Fe Mössbauer spectroscopy and direct-current magnetization studies of orthorhombic CaFe 4As 3, which undergoes two magnetic transitions with the formation of spin density wave at T N1= 88 K (incommensurate) and T N2= 26 K (commensurate). The magnetic Mössbauer spectroscopy spectra below T N1 are composed of four subspectra attributed to the four in-equivalent Fe crystallographic sites: three Fe ions in the divalent state (Fe2 +) and one as Fe1 +. However, the magnetic lines are much broader than that below T N2, indicating an incommensurate magnetic state. In the paramagnetic state, the Mössbauer spectroscopy spectra are composed of three doublets; one of them is related to Fe1 +. Evidence for spin fluctuations above T N1 is observed.
AB - We report on the 57Fe Mössbauer spectroscopy and direct-current magnetization studies of orthorhombic CaFe 4As 3, which undergoes two magnetic transitions with the formation of spin density wave at T N1= 88 K (incommensurate) and T N2= 26 K (commensurate). The magnetic Mössbauer spectroscopy spectra below T N1 are composed of four subspectra attributed to the four in-equivalent Fe crystallographic sites: three Fe ions in the divalent state (Fe2 +) and one as Fe1 +. However, the magnetic lines are much broader than that below T N2, indicating an incommensurate magnetic state. In the paramagnetic state, the Mössbauer spectroscopy spectra are composed of three doublets; one of them is related to Fe1 +. Evidence for spin fluctuations above T N1 is observed.
UR - http://www.scopus.com/inward/record.url?scp=84855290094&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.84.212402
DO - 10.1103/PhysRevB.84.212402
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AN - SCOPUS:84855290094
SN - 1098-0121
VL - 84
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 21
M1 - 212402
ER -