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Magnetic ordering and irreversible magnetization between ZFC and FC states in RCo5Ga7 compounds
Chang, H; Guo, YQ; Liang, JK; Rao, GH
Corresponding AuthorChang, H(chang_hong2@yahoo.com.cn)
2004-07-01
Source PublicationJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN0304-8853
Volume278Issue:3Pages:306-310
AbstractThe 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.
Keywordmagnetic properties ScFe6Ga6-type structure magnetic transition
DOI10.1016/j.jmmm.2003.12.1316
Indexed BySCI
Language英语
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Condensed Matter
WOS IDWOS:000222530100003
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80765
Corresponding AuthorChang, H
Affiliation1.Chinese Acad Sci, Inst Semicond, Open Lab Mat, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
3.Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
4.Cent Iron & Steel Res Inst, Div Funct Mat, Beijing 100081, Peoples R China
5.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Chang, H,Guo, YQ,Liang, JK,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 Chang, H,Guo, YQ,Liang, JK,&Rao, GH.(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 Chang, H,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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