Hauptseite > Publikationsdatenbank > Possible magnetic-polaron-switched positive and negative magnetoresistance in the GdSi single crystals > print

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005     20250129094328.0
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|a pmid:23087815
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|a pmc:PMC3475993
024 7 _ |2 DOI
|a 10.1038/srep00750
024 7 _ |2 WOS
|a WOS:000310448900004
024 7 _ |2 Handle
|a 2128/7612
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|a altmetric:1010930
024 7 _ |2 ISSN
|a 2045-2322
037 _ _ |a PreJuSER-23111
041 _ _ |a eng
082 _ _ |a 000
100 1 _ |0 P:(DE-Juel1)144092
|a Li, H.
|b 0
|u FZJ
245 _ _ |a Possible magnetic-polaron-switched positive and negative magnetoresistance in the GdSi single crystals
260 _ _ |a London
|b Nature Publishing Group
|c 2012
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500 _ _ |a Record converted from VDB: 12.11.2012
520 _ _ |a Magnetoresistance (MR) has attracted tremendous attention for possible technological applications. Understanding the role of magnetism in manipulating MR may in turn steer the searching for new applicable MR materials. Here we show that antiferromagnetic (AFM) GdSi metal displays an anisotropic positive MR value (PMRV), up to ~415%, accompanied by a large negative thermal volume expansion (NTVE). Around T(N) the PMRV translates to negative, down to ~-10.5%. Their theory-breaking magnetic-field dependencies [PMRV: dominantly linear; negative MR value (NMRV): quadratic] and the unusual NTVE indicate that PMRV is induced by the formation of magnetic polarons in 5d bands, whereas NMRV is possibly due to abated electron-spin scattering resulting from magnetic-field-aligned local 4f spins. Our results may open up a new avenue of searching for giant MR materials by suppressing the AFM transition temperature, opposite the case in manganites, and provide a promising approach to novel magnetic and electric devices.
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700 1 _ |0 P:(DE-Juel1)131047
|a Xiao, Y.
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700 1 _ |0 P:(DE-Juel1)VDB1442
|a Schmitz, B.
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700 1 _ |0 P:(DE-Juel1)VDB97577
|a Perßon, J.
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700 1 _ |0 P:(DE-Juel1)VDB1436
|a Schmidt, W.
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700 1 _ |0 P:(DE-Juel1)130836
|a Meuffels, P.
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|a Roth, G.
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|a Brückel, T.
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|a 10.1038/srep00750
|n Art. No.750
|t Scientific Reports
|v 2
|x 2045-2322
|y 2012
856 7 _ |2 Pubmed Central
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914 1 _ |a Sci. Rep. 2, 750; DOI: 10.1038/srep00750 (2012) noch nicht erschienen
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