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Title: Magnetic moment evolution and spin freezing in doped BaFe2As2

Fe-K β X-ray emission spectroscopy measurements reveal an asymmetric doping dependence of the magnetic moments μ bare in electron- and hole-doped BaFe 2As 2. At low temperature, μ bare is nearly constant in hole-doped samples, whereas it decreases upon electron doping. Increasing temperature substantially enhances μ bare in the hole-doped region, which is naturally explained by the theoretically predicted crossover into a spin-frozen state. Our measurements demonstrate the importance of Hund’s-coupling and electronic correlations, especially for hole-doped BaFe 2As 2, as well as the inadequacy of a fully localized or fully itinerant description of the 122 family of Fe pnictides.
Authors:
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Publication Date:
Grant/Contract Number:
SC0012311; C-1893
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Kabelwerke Brugg AG Holding (Switzerland); Univ. of Applied Sciences Northwestern Switzerland (FHNW); Paul Scherrer Inst. (PSI); Swiss National Science Foundation (SNSF); Japan Synchrotron Radiation Research Inst. (JASRI); Swiss Federal Inst. of Technology in Zurich (Switzerland); Rice Univ., Houston, TX (United States)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Magnetic properties and materials; Superconducting properties and materials
OSTI Identifier:
1425367

Pelliciari, Jonathan, Huang, Yaobo, Ishii, Kenji, Zhang, Chenglin, Dai, Pengcheng, Chen, Gen Fu, Xing, Lingyi, Wang, Xiancheng, Jin, Changqing, Ding, Hong, Werner, Philipp, and Schmitt, Thorsten. Magnetic moment evolution and spin freezing in doped BaFe2As2. United States: N. p., Web. doi:10.1038/s41598-017-07286-6.
Pelliciari, Jonathan, Huang, Yaobo, Ishii, Kenji, Zhang, Chenglin, Dai, Pengcheng, Chen, Gen Fu, Xing, Lingyi, Wang, Xiancheng, Jin, Changqing, Ding, Hong, Werner, Philipp, & Schmitt, Thorsten. Magnetic moment evolution and spin freezing in doped BaFe2As2. United States. doi:10.1038/s41598-017-07286-6.
Pelliciari, Jonathan, Huang, Yaobo, Ishii, Kenji, Zhang, Chenglin, Dai, Pengcheng, Chen, Gen Fu, Xing, Lingyi, Wang, Xiancheng, Jin, Changqing, Ding, Hong, Werner, Philipp, and Schmitt, Thorsten. 2017. "Magnetic moment evolution and spin freezing in doped BaFe2As2". United States. doi:10.1038/s41598-017-07286-6. https://www.osti.gov/servlets/purl/1425367.
@article{osti_1425367,
title = {Magnetic moment evolution and spin freezing in doped BaFe2As2},
author = {Pelliciari, Jonathan and Huang, Yaobo and Ishii, Kenji and Zhang, Chenglin and Dai, Pengcheng and Chen, Gen Fu and Xing, Lingyi and Wang, Xiancheng and Jin, Changqing and Ding, Hong and Werner, Philipp and Schmitt, Thorsten},
abstractNote = {Fe-Kβ X-ray emission spectroscopy measurements reveal an asymmetric doping dependence of the magnetic moments μbare in electron- and hole-doped BaFe2As2. At low temperature, μbare is nearly constant in hole-doped samples, whereas it decreases upon electron doping. Increasing temperature substantially enhances μbare in the hole-doped region, which is naturally explained by the theoretically predicted crossover into a spin-frozen state. Our measurements demonstrate the importance of Hund’s-coupling and electronic correlations, especially for hole-doped BaFe2As2, as well as the inadequacy of a fully localized or fully itinerant description of the 122 family of Fe pnictides.},
doi = {10.1038/s41598-017-07286-6},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {2017},
month = {8}
}