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Field dependence of the Eu2+ spin relaxation in EuFe2-xCoxAs2.

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Title: Field dependence of the Eu2+ spin relaxation in EuFe2-xCoxAs2.
Authors: Garcia, F. A.1 fgarcia@ifi.unicamp.br, Leithe-Jasper, A.1, Schnelle, W.1, Nicklas, M.1, Rosner, H.1, Sichelschmidt, J.1
Source: New Journal of Physics. 2012, Vol. 14 Issue 6, p1-12. 12p.
Subjects: Magnetic properties, Couplings (Gearing), Fluctuations (Physics), Relaxation (Nuclear physics), Superconductivity, Physics
Abstract: The layered compound EuFe2As2 is an interesting model system to investigate the effects of well-defined local Eu2+ 4f states on the itinerant electronic and magnetic properties of the FeAs layers. To address this subject, we investigated the series EuFe2-xCoxAs2 (0.1 ⩽ x ⩽ 0.75) by electron spin resonance (ESR) of Eu2+ to probe the spin dynamics of the itinerant subsystem. We relate the results to dc-susceptibility measurements and band structure calculations. As a consequence of the weak coupling between the local and itinerant subsystems, we found that the spin relaxation is well understood in terms of the exchange coupling among the local Eu2+ spins. A pronounced field dependence of the Eu2+ spin relaxation demonstrates the direct influence of magnetic fluctuations at the Fe2-xCoxAs2 layers. [ABSTRACT FROM AUTHOR]
Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 78198830
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Field dependence of the Eu<superscript>2+</superscript> spin relaxation in EuFe<subscript>2-x</subscript>Co<subscript>x</subscript>As<subscript>2</subscript>.
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  Data: <searchLink fieldCode="JN" term="%22New+Journal+of+Physics%22">New Journal of Physics</searchLink>. 2012, Vol. 14 Issue 6, p1-12. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+properties%22">Magnetic properties</searchLink><br /><searchLink fieldCode="DE" term="%22Couplings+%28Gearing%29%22">Couplings (Gearing)</searchLink><br /><searchLink fieldCode="DE" term="%22Fluctuations+%28Physics%29%22">Fluctuations (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Relaxation+%28Nuclear+physics%29%22">Relaxation (Nuclear physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Physics%22">Physics</searchLink>
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  Data: The layered compound EuFe2As2 is an interesting model system to investigate the effects of well-defined local Eu2+ 4f states on the itinerant electronic and magnetic properties of the FeAs layers. To address this subject, we investigated the series EuFe2-xCoxAs2 (0.1 ⩽ x ⩽ 0.75) by electron spin resonance (ESR) of Eu2+ to probe the spin dynamics of the itinerant subsystem. We relate the results to dc-susceptibility measurements and band structure calculations. As a consequence of the weak coupling between the local and itinerant subsystems, we found that the spin relaxation is well understood in terms of the exchange coupling among the local Eu2+ spins. A pronounced field dependence of the Eu2+ spin relaxation demonstrates the direct influence of magnetic fluctuations at the Fe2-xCoxAs2 layers. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of New Journal of Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1088/1367-2630/14/6/063005
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        Text: English
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      – SubjectFull: Magnetic properties
        Type: general
      – SubjectFull: Couplings (Gearing)
        Type: general
      – SubjectFull: Fluctuations (Physics)
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      – SubjectFull: Relaxation (Nuclear physics)
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      – SubjectFull: Physics
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      – TitleFull: Field dependence of the Eu2+ spin relaxation in EuFe2-xCoxAs2.
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              Text: 2012
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