C 59 o and A 75 s NMR investigation of lightly doped Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04)

F. L. Ning; K. Ahilan; T. Imai; A. S. Sefat; R. Jin; M. A. McGuire; B. C. Sales; D. Mandrus

doi:10.1103/PhysRevB.79.140506

C 59 o and A 75 s NMR investigation of lightly doped Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04)

F. L. Ning, K. Ahilan, T. Imai, A. S. Sefat, R. Jin, M. A. McGuire, B. C. Sales, D. Mandrus

Correlated Electron Materials

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Abstract

We investigate the electronic properties of Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04) in the lightly electron-doped regime by C 59 o and A 75 s NMR. We demonstrate that Co doping significantly suppresses the magnetic ordering temperature to the SDW state, TSDW. Furthermore, ordered moments below TSDW exhibit large distribution. Strong spin fluctuations remain even below TSDW, persisting all the way down to 4.2 K. We find no signature of additional freezing of spin degrees of freedom unlike the case of the lightly hole-doped stripe phase of the cuprates.

Original language	English
Article number	140506
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	79
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.79.140506
State	Published - Apr 1 2009

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title = "C 59 o and A 75 s NMR investigation of lightly doped Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04)",

abstract = "We investigate the electronic properties of Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04) in the lightly electron-doped regime by C 59 o and A 75 s NMR. We demonstrate that Co doping significantly suppresses the magnetic ordering temperature to the SDW state, TSDW. Furthermore, ordered moments below TSDW exhibit large distribution. Strong spin fluctuations remain even below TSDW, persisting all the way down to 4.2 K. We find no signature of additional freezing of spin degrees of freedom unlike the case of the lightly hole-doped stripe phase of the cuprates.",

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AU - Ning, F. L.

AU - Ahilan, K.

AU - Imai, T.

AU - Sefat, A. S.

AU - Jin, R.

AU - McGuire, M. A.

AU - Sales, B. C.

AU - Mandrus, D.

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Y1 - 2009/4/1

N2 - We investigate the electronic properties of Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04) in the lightly electron-doped regime by C 59 o and A 75 s NMR. We demonstrate that Co doping significantly suppresses the magnetic ordering temperature to the SDW state, TSDW. Furthermore, ordered moments below TSDW exhibit large distribution. Strong spin fluctuations remain even below TSDW, persisting all the way down to 4.2 K. We find no signature of additional freezing of spin degrees of freedom unlike the case of the lightly hole-doped stripe phase of the cuprates.

AB - We investigate the electronic properties of Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04) in the lightly electron-doped regime by C 59 o and A 75 s NMR. We demonstrate that Co doping significantly suppresses the magnetic ordering temperature to the SDW state, TSDW. Furthermore, ordered moments below TSDW exhibit large distribution. Strong spin fluctuations remain even below TSDW, persisting all the way down to 4.2 K. We find no signature of additional freezing of spin degrees of freedom unlike the case of the lightly hole-doped stripe phase of the cuprates.

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ER -

C 59 o and A 75 s NMR investigation of lightly doped Ba (Fe1-x Cox) 2 As2 (x=0.02,0.04)

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