| Автор | Q A Pankhurst |
| Автор | R J Pollard |
| Дата выпуска | 1993-09-27 |
| dc.description | The authors reply to the suggestion that a two-sublattice collinear spin model employed by them to analyse applied-field Mossbauer spectra of various insulators yields impossibly large values for the uniaxial anisotropy constant and should therefore be disregarded in favour of a model of speromagnetism. The authors note that the value of the anisotropy constant obtained for antiferromagnetic goethite ( alpha -FeOOH) using the collinear model, K<sub>1</sub> approximately=3*10<sup>5</sup> J m<sup>-3</sup>, is constant with both spin-flop measurements on bulk goethite and with independent theoretical calculations. The anisotropy constants of samples of the disordered iron oxyhydroxide feroxyhite ( delta '-FeOOH), obtained with the collinear model, may be as high as approximately 10*10<sup>5</sup> J m<sup>-3</sup>. The anisotropy constants of three reputedly speromagnetic insulators, calculated using the collinear model, fall within this range, and are therefore not impossibly large. The authors reaffirm that there remains a fundamental misconception in the belief that applied-field Mossbauer spectroscopy may be employed to distinguish between speromagnetism and antiferromagnetism in randomly aligned particles and disordered materials. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The inadequacy of applied-field Mossbauer spectroscopy as a means of proving the existence of speromagnetism |
| Тип | paper |
| DOI | 10.1088/0953-8984/5/39/018 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 5 |
| Первая страница | 7301 |
| Последняя страница | 7306 |
| Аффилиация | Q A Pankhurst; Dept. of Phys. Liverpool Univ., UK |
| Аффилиация | R J Pollard; Dept. of Phys. Liverpool Univ., UK |
| Выпуск | 39 |
