Multi-magnetic phases in the ferromagnetic ternary silicides Nd<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> and Tb<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub>
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | TENCÉ, Sophie | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GAUDIN, Etienne | |
| hal.structure.identifier | Laboratoire Léon Brillouin [LLB - UMR 12] | |
| dc.contributor.author | ANDRÉ, Gilles | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHEVALIER, Bernard | |
| dc.date.issued | 2009 | |
| dc.identifier.issn | 0022-3727 | |
| dc.description.abstractEn | Neutron powder diffraction experiments have been carried out on the hexagonal ternary silicides Nd<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> and Tb<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> in order to determine their magnetic structures. These compounds exhibit two successive ferromagnetic transitions at <i>T</i><sub>C</sub> = 84 K and <i>T</i><sub>1</sub> = 40 K for Nd<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> and at <i>T</i><sub>C</sub> = 186 K and <i>T</i><sub>1</sub> = 171 K for Tb<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub>. Single-crystal x-ray diffraction and specific heat measurements have been realized on Tb<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> in order to complete its characterization. Neutron diffraction investigation at 1.5 K reveals for both compounds a canted ferromagnetic structure with a propagation vector <b><i>k</i></b> = (0 0 0). The Nd moment values are, respectively, equal to μ<sub>1</sub> = 2.06(10)μ<sub>B</sub> and μ<sub>2</sub> = 3.14(9)μ<sub>B</sub> for Nd1 and Nd2 atoms whereas Tb1 and Tb2 atoms carry a magnetic moment of μ<sub>1</sub> = 7.9(2)μ<sub>B</sub> and μ<sub>2</sub> = 8.9(2)μ<sub>B</sub> in Tb<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub>. Moreover, a transition from a canted ferromagnet to a pure ferromagnet occurs at <i>T</i><sub>1</sub> = 40 K in Nd<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> while a spin reorientation of the non-collinear ferromagnetic structure occurs at <i>T</i><sub>1</sub> = 171 K for Tb<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub>. These magnetic structures are discussed on the basis of the atomic disorder existing for Co atoms in these ternary silicides around the Nd1 and Tb1 atoms. | |
| dc.language.iso | en | |
| dc.publisher | IOP Publishing | |
| dc.subject.en | Spin | |
| dc.subject.en | Neutron diffraction | |
| dc.subject.en | Nonmetallic ferromagnetic materials | |
| dc.subject.en | Magnetic phase boundaries | |
| dc.subject.en | X-ray diffraction | |
| dc.subject.en | Magnetic susceptibilities | |
| dc.title.en | Multi-magnetic phases in the ferromagnetic ternary silicides Nd<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> and Tb<sub>6</sub>Co<sub>1.67</sub>Si<sub>3</sub> | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1088/0022-3727/42/16/165003 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Journal of Physics D: Applied Physics | |
| bordeaux.page | 165003 (10 p.) | |
| bordeaux.volume | 42 | |
| bordeaux.issue | 16 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00418906 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00418906v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Physics%20D:%20Applied%20Physics&rft.date=2009&rft.volume=42&rft.issue=16&rft.spage=165003%20(10%20p.)&rft.epage=165003%20(10%20p.)&rft.eissn=0022-3727&rft.issn=0022-3727&rft.au=TENC%C3%89,%20Sophie&GAUDIN,%20Etienne&ANDR%C3%89,%20Gilles&CHEVALIER,%20Bernard&rft.genre=article |
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