| Автор | R Cywinski |
| Автор | S H Kilcoyne |
| Автор | C A Scott |
| Дата выпуска | 1991-08-19 |
| dc.description | High-resolution neutron powder diffraction and transverse field mu SR measurements have been used to examine the nature of the magnetic and structural transition at 100 K in YMn<sub>2</sub>. The neutron measurements indicate a first-order hysteretic transition occurring at 92.5 K on cooling and 108 K on warming. The low-temperature phase is tetragonal (c/a=0.995) and antiferromagnetic with localized Mn moments of 2.8 mu <sub>B</sub> ordering in a long-wavelength helix characterized by an antiferromagnetic translation vector ( tau , tau ',1) where tau =0.018 and tau '=0.003. The high-temperature phase is cubic and Pauli paramagnetic. The collapse of the Mn moment at the transition is accompanied by a 5% decrease in the cell volume. In the paramagnetic state of YMn<sub>2</sub> measurement of the muon transverse relaxation rate reveals an underlying second-order transition which the authors associate with the critical slowing of longitudinal spin fluctuations as the transition temperature is approached. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Magnetic order and moment stability in YMn<sub>2</sub> |
| Тип | paper |
| DOI | 10.1088/0953-8984/3/33/023 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 3 |
| Первая страница | 6473 |
| Последняя страница | 6488 |
| Аффилиация | R Cywinski; J.J. Thomson Phys. Lab., Reading Univ., UK |
| Аффилиация | S H Kilcoyne; J.J. Thomson Phys. Lab., Reading Univ., UK |
| Аффилиация | C A Scott; J.J. Thomson Phys. Lab., Reading Univ., UK |
| Выпуск | 33 |
