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Study of the spin dynamics in invars by small angle polarised neutron scattering. / Metelev, S. V.; Grigoriev, S. V.; Maleyev, S. V.; Okorokov, A. I.; Eckerlebe, H.; Van Dijk, N. H.; Brück, E.

In: Physica B: Condensed Matter, Vol. 350, No. 1-3 SUPPL. 1, 15.07.2004, p. e319-e322.

Research output: Contribution to journal › Article › peer-review

Harvard

Metelev, SV, Grigoriev, SV, Maleyev, SV, Okorokov, AI, Eckerlebe, H, Van Dijk, NH & Brück, E 2004, 'Study of the spin dynamics in invars by small angle polarised neutron scattering', Physica B: Condensed Matter, vol. 350, no. 1-3 SUPPL. 1, pp. e319-e322. https://doi.org/10.1016/j.physb.2004.03.078

APA

Metelev, S. V., Grigoriev, S. V., Maleyev, S. V., Okorokov, A. I., Eckerlebe, H., Van Dijk, N. H., & Brück, E. (2004). Study of the spin dynamics in invars by small angle polarised neutron scattering. Physica B: Condensed Matter, 350(1-3 SUPPL. 1), e319-e322. https://doi.org/10.1016/j.physb.2004.03.078

Vancouver

Metelev SV, Grigoriev SV, Maleyev SV, Okorokov AI, Eckerlebe H, Van Dijk NH et al. Study of the spin dynamics in invars by small angle polarised neutron scattering. Physica B: Condensed Matter. 2004 Jul 15;350(1-3 SUPPL. 1):e319-e322. https://doi.org/10.1016/j.physb.2004.03.078

Author

Metelev, S. V. ; Grigoriev, S. V. ; Maleyev, S. V. ; Okorokov, A. I. ; Eckerlebe, H. ; Van Dijk, N. H. ; Brück, E. / Study of the spin dynamics in invars by small angle polarised neutron scattering. In: Physica B: Condensed Matter. 2004 ; Vol. 350, No. 1-3 SUPPL. 1. pp. e319-e322.

BibTeX

@article{8ad569c3800b4055b5cc246e8cc89273,
title = "Study of the spin dynamics in invars by small angle polarised neutron scattering",
abstract = "The spin-wave dynamics in partially ordered Fe75Pt25 and disordered Fe65Ni35 invar alloys are investigated in the subcritical and intermediate temperature ranges using the inclined geometry method (IGM) in small angle polarised neutron scattering (SAPNS). This method is based on the analysis of the left-right asymmetry in the magnetic inelastic SAPNS arising when the direction of the magnetisation in the sample is inclined to the incident neutron wave vector. The spin-wave (SW) parameters, such as the SW stiffness D and the SW damping Γ, are obtained by comparison of the antisymmetrical contribution to the scattering with a model function. The temperature behaviour of the SW stiffness D was fitted using expression: {\~D} \τ\x, where τ = 1 - T/TC. It was found that x = 0.48±0.01 and x = 0.58±0.05 for the range |τ| > 0.1 for FeNi and FePt systems, respectively. The temperature behaviour of SW parameters D and Γ breaks down near TC in the range |τ|<0.1. Hence, we observe a crossover from mean-field theory predicting x = 0.5 to critical dynamics.",
keywords = "Invar, Spin wave",
author = "Metelev, {S. V.} and Grigoriev, {S. V.} and Maleyev, {S. V.} and Okorokov, {A. I.} and H. Eckerlebe and {Van Dijk}, {N. H.} and E. Br{\"u}ck",
note = "Funding Information: The work is supported in part by the RFBR (projects SS-1671.2003.2 and 01-02-17286) and the Russian State Program “Neutron Research of Solids” (contract 40.012.1.1.1149). The authors would like to express their sincere gratitude to the ECNS2003 Organising Committee for allocation of the grant.",
year = "2004",
month = jul,
day = "15",
doi = "10.1016/j.physb.2004.03.078",
language = "English",
volume = "350",
pages = "e319--e322",
journal = "Physica B: Condensed Matter",
issn = "0921-4526",
publisher = "Elsevier",
number = "1-3 SUPPL. 1",

}

RIS

TY - JOUR

T1 - Study of the spin dynamics in invars by small angle polarised neutron scattering

AU - Metelev, S. V.

AU - Grigoriev, S. V.

AU - Maleyev, S. V.

AU - Okorokov, A. I.

AU - Eckerlebe, H.

AU - Van Dijk, N. H.

AU - Brück, E.

N1 - Funding Information: The work is supported in part by the RFBR (projects SS-1671.2003.2 and 01-02-17286) and the Russian State Program “Neutron Research of Solids” (contract 40.012.1.1.1149). The authors would like to express their sincere gratitude to the ECNS2003 Organising Committee for allocation of the grant.

PY - 2004/7/15

Y1 - 2004/7/15

N2 - The spin-wave dynamics in partially ordered Fe75Pt25 and disordered Fe65Ni35 invar alloys are investigated in the subcritical and intermediate temperature ranges using the inclined geometry method (IGM) in small angle polarised neutron scattering (SAPNS). This method is based on the analysis of the left-right asymmetry in the magnetic inelastic SAPNS arising when the direction of the magnetisation in the sample is inclined to the incident neutron wave vector. The spin-wave (SW) parameters, such as the SW stiffness D and the SW damping Γ, are obtained by comparison of the antisymmetrical contribution to the scattering with a model function. The temperature behaviour of the SW stiffness D was fitted using expression: D̃ \τ\x, where τ = 1 - T/TC. It was found that x = 0.48±0.01 and x = 0.58±0.05 for the range |τ| > 0.1 for FeNi and FePt systems, respectively. The temperature behaviour of SW parameters D and Γ breaks down near TC in the range |τ|<0.1. Hence, we observe a crossover from mean-field theory predicting x = 0.5 to critical dynamics.

AB - The spin-wave dynamics in partially ordered Fe75Pt25 and disordered Fe65Ni35 invar alloys are investigated in the subcritical and intermediate temperature ranges using the inclined geometry method (IGM) in small angle polarised neutron scattering (SAPNS). This method is based on the analysis of the left-right asymmetry in the magnetic inelastic SAPNS arising when the direction of the magnetisation in the sample is inclined to the incident neutron wave vector. The spin-wave (SW) parameters, such as the SW stiffness D and the SW damping Γ, are obtained by comparison of the antisymmetrical contribution to the scattering with a model function. The temperature behaviour of the SW stiffness D was fitted using expression: D̃ \τ\x, where τ = 1 - T/TC. It was found that x = 0.48±0.01 and x = 0.58±0.05 for the range |τ| > 0.1 for FeNi and FePt systems, respectively. The temperature behaviour of SW parameters D and Γ breaks down near TC in the range |τ|<0.1. Hence, we observe a crossover from mean-field theory predicting x = 0.5 to critical dynamics.

KW - Invar

KW - Spin wave

UR - http://www.scopus.com/inward/record.url?scp=23044487192&partnerID=8YFLogxK

U2 - 10.1016/j.physb.2004.03.078

DO - 10.1016/j.physb.2004.03.078

M3 - Article

AN - SCOPUS:23044487192

VL - 350

SP - e319-e322

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

SN - 0921-4526

IS - 1-3 SUPPL. 1

ER -

ID: 86433711