| Magnetic ordering and irreversible magnetization between ZFC and FC states in RCo5Ga7 compounds | |
| H. Chang; Y. Q. Guo; J. K. Liang; G. H. Rao | |
| 2004 | |
| Source Publication | Journal of Magnetism and Magnetic Materials
 |
| ISSN | 0304-8853 |
| Volume | 278Issue:3Pages:306-310 |
| Abstract | The magnetic properties of RCo5Ga7 (R = Y, Tb, Dy, Ho and Er) compounds which crystallize in the ScFe6Ga6-type structure have been studied. The compounds with R, Y, Tb, Dy, Ho and Er display behaviour similar to semiconductors. The Co transition metal sublattice is ferrimagnetic with a very low spontaneous magnetization. The ferrimagnetic ordering observed for R = Y, Tb, Dy, Ho and Er is due to the transition metal sublattice with transition temperatures at about 295 K. At low temperatures, the magnetic ordering for R Tb, Dy, Ho and Er is due to the rare-earth sublattice, which is ferromagnetic with a Curie temperature below 5 K. By fitting the linear part of the inverse magnetization, the effective magnetic moment of the R ion is found to be close to its expected theoretical value, with paramagnetic Curie temperatures below 5 K. Due to the paramagnetic nature of the R sublattice above 60 K, the ferrimagnetic ordering temperature of the Co sublattice does not vary with the type of rare-earth ion. The irreversibility of the magnetization of YCo5Ga7, as measured in zero-field cooled (ZFC) and field cooled (FC) states, is attributed to movement of domain walls. Application of a large enough applied field completes the movement of the domain wall from the low-temperature to the high-temperature one at 5 K. With a very low magnetic field 100 Oe, the difference between the ZFC and the FC shrinks. (C) 2004 Elsevier B.V. All rights reserved. |
| description.department | chinese acad sci, inst semicond, open lab mat, beijing 100083, peoples r china. chinese acad sci, inst phys, beijing 100080, peoples r china. chinese acad sci, ctr condensed matter phys, beijing 100080, peoples r china. cent iron & steel res inst, div funct mat, beijing 100081, peoples r china. chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;chang, h (reprint author), chinese acad sci, inst semicond, open lab mat, box 912, beijing 100083, peoples r china;chang_hong2@yahoo.com.cn |
| Keyword | Magnetic Properties Scfe6ga6-type Structure Magnetic Transition Neutron-diffraction Ferromagnetic Transition X-ray Sm Gd Magnetoresistance Earth Tb Lu Er |
| URL | 查看原文 |
| WOS ID | WOS:000222530100003 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/35316 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | H. Chang,Y. Q. Guo,J. K. Liang,et al. Magnetic ordering and irreversible magnetization between ZFC and FC states in RCo5Ga7 compounds[J]. Journal of Magnetism and Magnetic Materials,2004,278(3):306-310. |
| APA | H. Chang,Y. Q. Guo,J. K. Liang,&G. H. Rao.(2004).Magnetic ordering and irreversible magnetization between ZFC and FC states in RCo5Ga7 compounds.Journal of Magnetism and Magnetic Materials,278(3),306-310. |
| MLA | H. Chang,et al."Magnetic ordering and irreversible magnetization between ZFC and FC states in RCo5Ga7 compounds".Journal of Magnetism and Magnetic Materials 278.3(2004):306-310. |
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