| Автор | P Warren |
| Автор | J B Forsyth |
| Автор | G J McIntyre |
| Автор | N Bernhoeft |
| Дата выпуска | 1992-06-29 |
| dc.description | A single-crystal neutron diffraction study of the cubic Laves phase Fe<sub>2</sub>Zr at 4.2 K has been made using both polarized and unpolarized incident beams. The samples were prepared from high-purity zirconium and iron and exhibited resistance ratios (<sub>rho 293</sub> <sub>K</sub>/<sub>rho 4.2 K</sub>) of typically 95, indicative of samples with good long-range order and homogeneity. The material has a Curie temperature of 604(2) K and a cell dimension of a=7.063(1) AA at ambient temperature in agreement with previous measurements for this composition by others. The saturation magnetization of 3.46(1) mu <sub>B</sub>/formula unit at 4.2 K is higher than previously observed. The magnetization density of the sample has been fitted by a weighted least-squares procedure to a multipole model of the iron moment based on free-atom wavefunctions for Fe<sup>2+</sup>. The symmetry at the iron site is 3m and the independent symmetry-allowed multipoles up to l=4 are Y<sub>00</sub>, Y<sub>20</sub>, Y<sub>40</sub> and Y<sub>43-</sub>: these have amplitudes 2.11(3), 0.03(2), 0.16(4) and -0.30(4) mu <sub>B</sub> respectively. The magnetization at the Zr site is negative and is modelled by a single spherical term, Y<sub>00</sub>=-0.32(5) mu <sub>B</sub>. The remaining magnetization of -0.44 mu <sub>B</sub>/formula unit is associated with diffuse density. These findings are discussed in the light of band structure calculations and previous studies of magnetic Laves phases. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A single-crystal neutron diffraction study of the magnetization density in Fe<sub>2</sub>Zr |
| Тип | paper |
| DOI | 10.1088/0953-8984/4/26/013 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 4 |
| Первая страница | 5795 |
| Последняя страница | 5800 |
| Аффилиация | P Warren; Dept. of Phys., Durham Univ., UK |
| Аффилиация | J B Forsyth; Dept. of Phys., Durham Univ., UK |
| Аффилиация | G J McIntyre; Dept. of Phys., Durham Univ., UK |
| Аффилиация | N Bernhoeft; Dept. of Phys., Durham Univ., UK |
| Выпуск | 26 |
