75As NMR and XRD Study of Structural and Electronic Inhomogeneities in Ba(Fe1−xNix)2As2
| Autor: | E. G. Nikolaev, K. S. Pervakov, V. A. Vlasenko, V. P. Martovitsky, Yu. Eltsev, L. B. Lugansky, S.L. Bud'ko, P. C. Canfield |
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| Rok vydání: | 2018 |
| Předmět: |
education.field_of_study
Materials science Population Relaxation (NMR) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Homogeneous distribution Electronic Optical and Magnetic Materials NMR spectra database Crystallography 0103 physical sciences X-ray crystallography Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology education Single crystal Phase diagram |
| Zdroj: | Journal of Superconductivity and Novel Magnetism. 31:3289-3295 |
| ISSN: | 1557-1947 1557-1939 |
| DOI: | 10.1007/s10948-018-4587-x |
| Popis: | We have used 75As NMR and x-ray diffraction analysis to study the structural and electronic inhomogeneities in Ba(Fe1−xNix)2As2 crystals with x near the border of the antiferromagnetic domain. Unequal nickel population of the equivalent Fe planes and rather homogeneous distribution of Ni inside the planes have been found in the well-ordered single crystal with x = 0.036. Below 40 K a signal wipeout of 75As NMR spectra is observed for the crystals with x = 0.036 and 0.037. This fact together with spin-lattice relaxation peculiarities is treated a result of the system glassy behavior in this region of the phase diagram. The 75As NMR data also indicate on partial suppression of antiferromagnetic spin fluctuations around the Ni impurity in these crystals at low temperatures. |
| Databáze: | OpenAIRE |
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