Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy

H. Gretarsson; A. Lupascu; Jungho Kim; D. Casa; T. Gog; W. Wu; S. R. Julian; Z. J. Xu; J. S. Wen; G. D. Gu; R. H. Yuan; Z. G. Chen; N. L. Wang; S. Khim; K. H. Kim; M. Ishikado; I. Jarrige; S. Shamoto; J. H. Chu; I. R. Fisher; Young June Kim

doi:10.1103/PhysRevB.84.100509

Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy

H. Gretarsson, A. Lupascu, Jungho Kim, D. Casa, T. Gog, W. Wu, S. R. Julian, Z. J. Xu, J. S. Wen, G. D. Gu, R. H. Yuan, Z. G. Chen, N. L. Wang, S. Khim, K. H. Kim, M. Ishikado, I. Jarrige, S. Shamoto, J. H. Chu, I. R. FisherYoung June Kim

Department of Physics

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

Abstract

We report a Fe Kβ x-ray emission spectroscopy study of local magnetic moments in various iron-based superconductors in their paramagnetic phases. Local magnetic moments are found in all samples studied: PrFeAsO, Ba( _Fe,Co)2As₂, LiFeAs, Fe_1+x(Te,Se), and A ₂Fe₄Se₅ (where A=K, Rb, and Cs). The moment size is independent of temperature or carrier concentration but varies significantly across different families. Specifically, all iron pnictide samples have local moments of about 1μ_B/Fe, while FeTe and K ₂Fe₄Se₅ families have much larger local moments of ∼2μ_B/Fe and ∼3.3μ_B/Fe, respectively. Our results illustrate the importance of multiorbital physics in describing magnetism of these compounds.

Original language	English
Article number	100509
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	84
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.84.100509
Publication status	Published - 2011 Sep 22

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Gretarsson, H., Lupascu, A., Kim, J., Casa, D., Gog, T., Wu, W., Julian, S. R., Xu, Z. J., Wen, J. S., Gu, G. D., Yuan, R. H., Chen, Z. G., Wang, N. L., Khim, S., Kim, K. H., Ishikado, M., Jarrige, I., Shamoto, S., Chu, J. H., ... Kim, Y. J. (2011). Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy. Physical Review B - Condensed Matter and Materials Physics, 84(10), [100509]. https://doi.org/10.1103/PhysRevB.84.100509

Gretarsson, H. ; Lupascu, A. ; Kim, Jungho ; Casa, D. ; Gog, T. ; Wu, W. ; Julian, S. R. ; Xu, Z. J. ; Wen, J. S. ; Gu, G. D. ; Yuan, R. H. ; Chen, Z. G. ; Wang, N. L. ; Khim, S. ; Kim, K. H. ; Ishikado, M. ; Jarrige, I. ; Shamoto, S. ; Chu, J. H. ; Fisher, I. R. ; Kim, Young June. / Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy. In: Physical Review B - Condensed Matter and Materials Physics. 2011 ; Vol. 84, No. 10.

@article{ab6e464ac2d8448aa969af500c50a748,

title = "Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy",

abstract = "We report a Fe Kβ x-ray emission spectroscopy study of local magnetic moments in various iron-based superconductors in their paramagnetic phases. Local magnetic moments are found in all samples studied: PrFeAsO, Ba( Fe,Co)2As2, LiFeAs, Fe1+x(Te,Se), and A 2Fe4Se5 (where A=K, Rb, and Cs). The moment size is independent of temperature or carrier concentration but varies significantly across different families. Specifically, all iron pnictide samples have local moments of about 1μB/Fe, while FeTe and K 2Fe4Se5 families have much larger local moments of ∼2μB/Fe and ∼3.3μB/Fe, respectively. Our results illustrate the importance of multiorbital physics in describing magnetism of these compounds.",

author = "H. Gretarsson and A. Lupascu and Jungho Kim and D. Casa and T. Gog and W. Wu and Julian, {S. R.} and Xu, {Z. J.} and Wen, {J. S.} and Gu, {G. D.} and Yuan, {R. H.} and Chen, {Z. G.} and Wang, {N. L.} and S. Khim and Kim, {K. H.} and M. Ishikado and I. Jarrige and S. Shamoto and Chu, {J. H.} and Fisher, {I. R.} and Kim, {Young June}",

year = "2011",

month = sep,

day = "22",

doi = "10.1103/PhysRevB.84.100509",

language = "English",

volume = "84",

journal = "Physical Review B-Condensed Matter",

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Gretarsson, H, Lupascu, A, Kim, J, Casa, D, Gog, T, Wu, W, Julian, SR, Xu, ZJ, Wen, JS, Gu, GD, Yuan, RH, Chen, ZG, Wang, NL, Khim, S, Kim, KH, Ishikado, M, Jarrige, I, Shamoto, S, Chu, JH, Fisher, IR & Kim, YJ 2011, 'Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy', Physical Review B - Condensed Matter and Materials Physics, vol. 84, no. 10, 100509. https://doi.org/10.1103/PhysRevB.84.100509

Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy. / Gretarsson, H.; Lupascu, A.; Kim, Jungho; Casa, D.; Gog, T.; Wu, W.; Julian, S. R.; Xu, Z. J.; Wen, J. S.; Gu, G. D.; Yuan, R. H.; Chen, Z. G.; Wang, N. L.; Khim, S.; Kim, K. H.; Ishikado, M.; Jarrige, I.; Shamoto, S.; Chu, J. H.; Fisher, I. R.; Kim, Young June.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 10, 100509, 22.09.2011.

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

TY - JOUR

T1 - Revealing the dual nature of magnetism in iron pnictides and iron chalcogenides using x-ray emission spectroscopy

AU - Gretarsson, H.

AU - Lupascu, A.

AU - Kim, Jungho

AU - Casa, D.

AU - Gog, T.

AU - Wu, W.

AU - Julian, S. R.

AU - Xu, Z. J.

AU - Wen, J. S.

AU - Gu, G. D.

AU - Yuan, R. H.

AU - Chen, Z. G.

AU - Wang, N. L.

AU - Khim, S.

AU - Kim, K. H.

AU - Ishikado, M.

AU - Jarrige, I.

AU - Shamoto, S.

AU - Chu, J. H.

AU - Fisher, I. R.

AU - Kim, Young June

PY - 2011/9/22

Y1 - 2011/9/22

N2 - We report a Fe Kβ x-ray emission spectroscopy study of local magnetic moments in various iron-based superconductors in their paramagnetic phases. Local magnetic moments are found in all samples studied: PrFeAsO, Ba( Fe,Co)2As2, LiFeAs, Fe1+x(Te,Se), and A 2Fe4Se5 (where A=K, Rb, and Cs). The moment size is independent of temperature or carrier concentration but varies significantly across different families. Specifically, all iron pnictide samples have local moments of about 1μB/Fe, while FeTe and K 2Fe4Se5 families have much larger local moments of ∼2μB/Fe and ∼3.3μB/Fe, respectively. Our results illustrate the importance of multiorbital physics in describing magnetism of these compounds.

AB - We report a Fe Kβ x-ray emission spectroscopy study of local magnetic moments in various iron-based superconductors in their paramagnetic phases. Local magnetic moments are found in all samples studied: PrFeAsO, Ba( Fe,Co)2As2, LiFeAs, Fe1+x(Te,Se), and A 2Fe4Se5 (where A=K, Rb, and Cs). The moment size is independent of temperature or carrier concentration but varies significantly across different families. Specifically, all iron pnictide samples have local moments of about 1μB/Fe, while FeTe and K 2Fe4Se5 families have much larger local moments of ∼2μB/Fe and ∼3.3μB/Fe, respectively. Our results illustrate the importance of multiorbital physics in describing magnetism of these compounds.

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U2 - 10.1103/PhysRevB.84.100509

DO - 10.1103/PhysRevB.84.100509

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VL - 84

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

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