Mn local moments prevent superconductivity in iron pnictides Ba(Fe 1xMn x) 2As 2

Y. Texier; Y. Laplace; P. Mendels; J. T. Park; G. Friemel; D. L. Sun; D. S. Inosov; C. T. Lin; J. Bobroff

doi:10.1209/0295-5075/99/17002

Mn local moments prevent superconductivity in iron pnictides Ba(Fe _1xMn _x) ₂As ₂

Y. Texier
, Y. Laplace
, P. Mendels
, J. T. Park
, G. Friemel
, D. L. Sun
, D. S. Inosov
, C. T. Lin
, J. Bobroff

Laboratoire de Physique des Solides
Institut Universitaire de France
CNRS

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

⁷⁵As nuclear magnetic resonance (NMR) experiments were performed on Ba(Fe _1xMn _x) ₂As ₂ (x _Mn=2.5%, 5% and 12%) single crystals. The Fe layer magnetic susceptibility far from Mn atoms is probed by the ⁷⁵As NMR line shift and is found similar to that of BaFe ₂As ₂, implying that Mn does not induce charge doping. A satellite line associated with the Mn nearest neighbours (n.n.) of ⁷⁵As displays a Curie-Weiss shift which demonstrates that Mn carries a local magnetic moment. This is confirmed by the main line broadening typical of a RKKY-like Mn-induced staggered spin polarization. The Mn moment is due to the localization of the additional Mn hole. These findings explain why Mn does not induce superconductivity in the pnictides contrary to other dopants such as Co, Ni, Ru or K.

Original language	English
Article number	17002
Journal	EPL
Volume	99
Issue number	1
DOIs	https://doi.org/10.1209/0295-5075/99/17002
Publication status	Published - 1 Jul 2012
Externally published	Yes

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title = "Mn local moments prevent superconductivity in iron pnictides Ba(Fe 1xMn x) 2As 2 ",

abstract = "75As nuclear magnetic resonance (NMR) experiments were performed on Ba(Fe 1xMn x) 2As 2 (x Mn=2.5\%, 5\% and 12\%) single crystals. The Fe layer magnetic susceptibility far from Mn atoms is probed by the 75As NMR line shift and is found similar to that of BaFe 2As 2, implying that Mn does not induce charge doping. A satellite line associated with the Mn nearest neighbours (n.n.) of 75As displays a Curie-Weiss shift which demonstrates that Mn carries a local magnetic moment. This is confirmed by the main line broadening typical of a RKKY-like Mn-induced staggered spin polarization. The Mn moment is due to the localization of the additional Mn hole. These findings explain why Mn does not induce superconductivity in the pnictides contrary to other dopants such as Co, Ni, Ru or K.",

author = "Y. Texier and Y. Laplace and P. Mendels and Park, \{J. T.\} and G. Friemel and Sun, \{D. L.\} and Inosov, \{D. S.\} and Lin, \{C. T.\} and J. Bobroff",

year = "2012",

month = jul,

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doi = "10.1209/0295-5075/99/17002",

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TY - JOUR

T1 - Mn local moments prevent superconductivity in iron pnictides Ba(Fe 1xMn x) 2As 2

AU - Texier, Y.

AU - Laplace, Y.

AU - Mendels, P.

AU - Park, J. T.

AU - Friemel, G.

AU - Sun, D. L.

AU - Inosov, D. S.

AU - Lin, C. T.

AU - Bobroff, J.

PY - 2012/7/1

Y1 - 2012/7/1

N2 - 75As nuclear magnetic resonance (NMR) experiments were performed on Ba(Fe 1xMn x) 2As 2 (x Mn=2.5%, 5% and 12%) single crystals. The Fe layer magnetic susceptibility far from Mn atoms is probed by the 75As NMR line shift and is found similar to that of BaFe 2As 2, implying that Mn does not induce charge doping. A satellite line associated with the Mn nearest neighbours (n.n.) of 75As displays a Curie-Weiss shift which demonstrates that Mn carries a local magnetic moment. This is confirmed by the main line broadening typical of a RKKY-like Mn-induced staggered spin polarization. The Mn moment is due to the localization of the additional Mn hole. These findings explain why Mn does not induce superconductivity in the pnictides contrary to other dopants such as Co, Ni, Ru or K.

AB - 75As nuclear magnetic resonance (NMR) experiments were performed on Ba(Fe 1xMn x) 2As 2 (x Mn=2.5%, 5% and 12%) single crystals. The Fe layer magnetic susceptibility far from Mn atoms is probed by the 75As NMR line shift and is found similar to that of BaFe 2As 2, implying that Mn does not induce charge doping. A satellite line associated with the Mn nearest neighbours (n.n.) of 75As displays a Curie-Weiss shift which demonstrates that Mn carries a local magnetic moment. This is confirmed by the main line broadening typical of a RKKY-like Mn-induced staggered spin polarization. The Mn moment is due to the localization of the additional Mn hole. These findings explain why Mn does not induce superconductivity in the pnictides contrary to other dopants such as Co, Ni, Ru or K.

U2 - 10.1209/0295-5075/99/17002

DO - 10.1209/0295-5075/99/17002

M3 - Article

AN - SCOPUS:84863651832

SN - 0295-5075

VL - 99

JO - EPL

JF - EPL

IS - 1

M1 - 17002

ER -

Mn local moments prevent superconductivity in iron pnictides Ba(Fe 1xMn x) 2As 2

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Mn local moments prevent superconductivity in iron pnictides Ba(Fe _1xMn _x) ₂As ₂