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Hyperfine interactions in magnetoelectric hexaferrite system |
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| Authors: | Karel Kou?il Vojtěch Chlan Helena ?těpánková Pavel Novák Karel Kní?ek Ji?í Hybler Tsuyoshi Kimura Yuji Hiraoka Josef Bur?ík |
| Institution: | 1. Charles University in Prague, Faculty of Mathematics and Physics, V Hole?ovi?kách 2, 180 00 Prague 8, Czech Republic;2. Institute of Physics ASCR, Cukrovarnická 10, 162 53 Prague 6, Czech Republic;3. Graduae School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan;4. Institute of Inorganic Chemistry ASCR, 250 68 ?e?, Czech Republic;1. National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, People''s Republic of China;2. Institute of Condensed State Physics, Jilin Normal University, Siping 136000, People''s Republic of China;1. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;2. Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;3. Université de Toulouse, Institut Carnot CIRIMAT – UMR CNRS-UPS-INP 5085, Université Paul Sabatier, Toulouse 31062, France |
| Abstract: | Nuclear magnetic resonance (NMR) in Y-hexaferrite system (Ba1?xSrx)2Zn2Fe12O22 was measured on both monocrystalline and polycrystalline samples at liquid helium temperature. Corresponding ab-initio calculation of the hyperfine parameters was also performed. The signal from 57Fe was detected in the frequency interval 65–76 MHz, while NMR spectrum of 67Zn nuclei occurs between 15 and 30 MHz. Due to the disorder in two tetrahedral sublattices occupied partly by Zn and partly by Fe, the NMR lines are broad and the spectra are poorly resolved. Comparison between the experimentally observed 67Zn spectra and the spectra modelled using the calculated hyperfine parameters was made. It indicates that the spectra of 67Zn can be used to determine the distribution of Zn and Fe between the two tetrahedral sublattices. |
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