TY - JOUR
T1 - Electromagnetic properties of undoped LaFePnO (Pn P, As)
AU - Kamihara, Y.
AU - Watanabe, T.
AU - Nomura, T.
AU - Kim, S. W.
AU - Kamiya, T.
AU - Hirano, M.
AU - Hosono, H.
N1 - Funding Information:
This research was partially supported by the Happy Tech Pro-gram through the National Research Foundation of Korea (NRF),which was funded by the Ministry of Education, Science and Tech-nology (grant number: 2009-0091918, 2010-0020786), the KIST Institutional Program (2E26180), and Basic Science Research Pro-gram through the National Research Foundation of Korea (NRF)funded by the Ministry of Science, ICT & Future Planning (NRF-2014R1A1A3052557).
PY - 2009
Y1 - 2009
N2 - Undoped LaFePnO (Pn P, As) shows metallic resistivity and a tetragonal phase at room temperature. The electrical resistivity (ρ) of undoped LaFeAsO exhibits a sudden decrease around Tanom ∼160 K with decreasing the temperature and increases with decreasing the temperatures (T) below another threshold temperature (Tmin). It makes a contrast to undoped LaFePO, which shows neither of Tanom nor Tmin. The T anom corresponds to a crystallographic phase transition: undoped LaFeAsO shows an orthorhombic phase at temperatures < 160 K. A positive magnetoresistance (MR (ρ-ρ0) / ρ0) also appears below T anom. DFT calculations indicate that spin moment of LaFeAsO is 1.56 μB / Fe in an antiferromagnetic spin configuration in a tetragonal phase, while spin moment of LaFePO is almost quenched.
AB - Undoped LaFePnO (Pn P, As) shows metallic resistivity and a tetragonal phase at room temperature. The electrical resistivity (ρ) of undoped LaFeAsO exhibits a sudden decrease around Tanom ∼160 K with decreasing the temperature and increases with decreasing the temperatures (T) below another threshold temperature (Tmin). It makes a contrast to undoped LaFePO, which shows neither of Tanom nor Tmin. The T anom corresponds to a crystallographic phase transition: undoped LaFeAsO shows an orthorhombic phase at temperatures < 160 K. A positive magnetoresistance (MR (ρ-ρ0) / ρ0) also appears below T anom. DFT calculations indicate that spin moment of LaFeAsO is 1.56 μB / Fe in an antiferromagnetic spin configuration in a tetragonal phase, while spin moment of LaFePO is almost quenched.
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U2 - 10.1088/1742-6596/150/5/052090
DO - 10.1088/1742-6596/150/5/052090
M3 - Article
AN - SCOPUS:77952470820
SN - 1742-6588
VL - 150
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 5
M1 - 052090
ER -