| Автор | Bo-Ping Hu |
| Автор | Hong-Shuo Li |
| Автор | J P Gavigan |
| Автор | J M D Coey |
| Дата выпуска | 1989-01-30 |
| dc.description | Magnetic properties of the series of ThMn<sub>12</sub>-structure intermetallic compounds R(Fe<sub>11</sub>Ti) have been determined for rare earths from Nd to Lu plus Y. The highest Curie temperature (607 K) is for R=Gd, and R-Fe exchange interactions are much stronger for light rare earths than for heavy ones. The temperature dependence of the iron sublattice magnetisation and anisotropy are determined for the Y and Lu compounds. Spin reorientation transitions are found as a function of temperature for the rare earths with a negative second-order Stevens coefficient alpha <sub>J</sub>(Nd, Tb, Dy), and a set of crystal-field parameters is derived to account for the transitions in a consistent way. A sharp increase in magnetisation observed for Sm(Fe<sub>11</sub>Ti) below 130 K in a field of about 10 T applied perpendicular to the easy direction indicates that J-mixing may be important for Sm<sup>3+</sup>. Compared with R<sub>2</sub>Fe<sub>14</sub>B, the iron anisotropy in R(Fe<sub>11</sub>Ti) is greater, and the rare-earth anisotropy is much weaker at low temperature, with the opposite sign for the rare-earth crystal-field coefficient A<sub>20</sub>. The average iron moment is 1.7 mu <sub>B</sub> in R(Fe<sub>11</sub>Ti) at 4.2 K; Mossbauer spectra are analysed to yield the average moments on each site. Limits set by the intrinsic magnetic properties on the performance of magnets made from these families of alloys are discussed. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Intrinsic magnetic properties of the iron-rich ThMn<sub>12</sub>-structure alloys R(Fe<sub>11</sub>Ti); R=Y, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm and Lu |
| Тип | paper |
| DOI | 10.1088/0953-8984/1/4/009 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 1 |
| Первая страница | 755 |
| Последняя страница | 770 |
| Аффилиация | Bo-Ping Hu; Dept. of Pure & Appl. Phys., Trinity Coll., Dublin, Ireland |
| Аффилиация | Hong-Shuo Li; Dept. of Pure & Appl. Phys., Trinity Coll., Dublin, Ireland |
| Аффилиация | J P Gavigan; Dept. of Pure & Appl. Phys., Trinity Coll., Dublin, Ireland |
| Аффилиация | J M D Coey; Dept. of Pure & Appl. Phys., Trinity Coll., Dublin, Ireland |
| Выпуск | 4 |
