Cu substitution effects on the local magnetic properties of Ba(Fe_[1-x]Cu_[x])2As2: a site-selective 75-As and 63-Cu NMR study
We take advantage of the site-selective nature of the \(^{75}\)As and \(^{63}\)Cu NMR techniques to probe the Cu substitution effects on the local magnetic properties of the FeAs planes in Ba(Fe\(_{1-x}\)Cu\(_x\))\(_2\)As\(_2\). We show that the suppression of antiferromagnetic Fe spin fluctuations...
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| creator | Takeda, H Imai, T Tachibana, M Gaudet, J Gaulin, B D Saparov, B I Sefat, A S |
| description | We take advantage of the site-selective nature of the \(^{75}\)As and \(^{63}\)Cu NMR techniques to probe the Cu substitution effects on the local magnetic properties of the FeAs planes in Ba(Fe\(_{1-x}\)Cu\(_x\))\(_2\)As\(_2\). We show that the suppression of antiferromagnetic Fe spin fluctuations induced by Cu substitution is weaker than a naive expectation based on a simple rigid band picture, in which each Cu atom would donate 3 electrons to the FeAs planes. Comparison between \(^{63}\)Cu and \(^{75}\)As NMR data indicates that spin fluctuations are suppressed at the Cu and their neighboring Fe sites in the tetragonal phase, suggesting the strongly local nature of the Cu substitution effects. We attribute the absence of a large superconducting dome in the phase diagram of Ba(Fe\(_{1-x}\)Cu\(_x\))\(_2\)As\(_2\) to the emergence of a nearly magnetically ordered FeAs planes under the presence of orthorhombic distortion. |
| doi_str_mv | 10.48550/arxiv.1404.6657 |
| format | Article |
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We show that the suppression of antiferromagnetic Fe spin fluctuations induced by Cu substitution is weaker than a naive expectation based on a simple rigid band picture, in which each Cu atom would donate 3 electrons to the FeAs planes. Comparison between \(^{63}\)Cu and \(^{75}\)As NMR data indicates that spin fluctuations are suppressed at the Cu and their neighboring Fe sites in the tetragonal phase, suggesting the strongly local nature of the Cu substitution effects. We attribute the absence of a large superconducting dome in the phase diagram of Ba(Fe\(_{1-x}\)Cu\(_x\))\(_2\)As\(_2\) to the emergence of a nearly magnetically ordered FeAs planes under the presence of orthorhombic distortion.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1404.6657</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Antiferromagnetism ; Copper ; Magnetic properties ; Materials substitution ; NMR ; Nuclear magnetic resonance ; Phase diagrams ; Physics - Strongly Correlated Electrons ; Physics - Superconductivity ; Planes ; Variations</subject><ispartof>arXiv.org, 2014-08</ispartof><rights>2014. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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We show that the suppression of antiferromagnetic Fe spin fluctuations induced by Cu substitution is weaker than a naive expectation based on a simple rigid band picture, in which each Cu atom would donate 3 electrons to the FeAs planes. Comparison between \(^{63}\)Cu and \(^{75}\)As NMR data indicates that spin fluctuations are suppressed at the Cu and their neighboring Fe sites in the tetragonal phase, suggesting the strongly local nature of the Cu substitution effects. 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We show that the suppression of antiferromagnetic Fe spin fluctuations induced by Cu substitution is weaker than a naive expectation based on a simple rigid band picture, in which each Cu atom would donate 3 electrons to the FeAs planes. Comparison between \(^{63}\)Cu and \(^{75}\)As NMR data indicates that spin fluctuations are suppressed at the Cu and their neighboring Fe sites in the tetragonal phase, suggesting the strongly local nature of the Cu substitution effects. We attribute the absence of a large superconducting dome in the phase diagram of Ba(Fe\(_{1-x}\)Cu\(_x\))\(_2\)As\(_2\) to the emergence of a nearly magnetically ordered FeAs planes under the presence of orthorhombic distortion.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1404.6657</doi><oa>free_for_read</oa></addata></record> |
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| source | Freely Accessible Journals; arXiv.org |
| subjects | Antiferromagnetism Copper Magnetic properties Materials substitution NMR Nuclear magnetic resonance Phase diagrams Physics - Strongly Correlated Electrons Physics - Superconductivity Planes Variations |
| title | Cu substitution effects on the local magnetic properties of Ba(Fe_[1-x]Cu_[x])2As2: a site-selective 75-As and 63-Cu NMR study |
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