"Forbidden" magnon scattering in the weak ferromagnet MnSi

J. B. Sokoloff; W. H. Li; B. Pagonis; C. H. Perry; C. F. Majkrzak; G. Shirane; Y. Ishikawa

doi:10.1016/0038-1098(84)90736-1

"Forbidden" magnon scattering in the weak ferromagnet MnSi

J. B. Sokoloff, W. H. Li, B. Pagonis, C. H. Perry, C. F. Majkrzak, G. Shirane, Y. Ishikawa

物理學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

5 引文斯高帕斯（Scopus）

摘要

"Forbidden" magnon scattering (i.e. scattering in which magnons are created by increasing rather than decreasing the sample magnetization) has been observed in MnSi over the temperature range from 0.3 T_c to 2T_c in a magnetic field of 7.5 kOe. The existence of "forbidden" magnon scattering is in disagreement with theories of ferromagnetism formulated on the Random Phase Approximation. The linear behaviour of the inelastic neutron scattering intensity difference between the allowed magnon and its forbidden counterpart vs magnetization can be explained by the SKP model, which is based upon a slowly fluctuating spin density picture of itinerant ferromagnetism. Normally such behaviour is expected only for a relatively "strong" ferromagnet, but this picture seems also valid for a "weak" ferromagnet like MnSi.

原文	???core.languages.en_GB???
頁（從 - 到）	693-696
頁數	4
期刊	Solid State Communications
卷	52
發行號	7
DOIs	https://doi.org/10.1016/0038-1098(84)90736-1
出版狀態	已出版 - 11月 1984

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10.1016/0038-1098(84)90736-1

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@article{86784e4ae4194f9dbe0cc415d0f8d547,

title = "{"}Forbidden{"} magnon scattering in the weak ferromagnet MnSi",

abstract = "{"}Forbidden{"} magnon scattering (i.e. scattering in which magnons are created by increasing rather than decreasing the sample magnetization) has been observed in MnSi over the temperature range from 0.3 Tc to 2Tc in a magnetic field of 7.5 kOe. The existence of {"}forbidden{"} magnon scattering is in disagreement with theories of ferromagnetism formulated on the Random Phase Approximation. The linear behaviour of the inelastic neutron scattering intensity difference between the allowed magnon and its forbidden counterpart vs magnetization can be explained by the SKP model, which is based upon a slowly fluctuating spin density picture of itinerant ferromagnetism. Normally such behaviour is expected only for a relatively {"}strong{"} ferromagnet, but this picture seems also valid for a {"}weak{"} ferromagnet like MnSi.",

author = "Sokoloff, {J. B.} and Li, {W. H.} and B. Pagonis and Perry, {C. H.} and Majkrzak, {C. F.} and G. Shirane and Y. Ishikawa",

note = "Funding Information: Acknowledgements - This work is supported by the National Science Foundation under Grant No. DMR-8205480. The Brookhaven National Laboratory is supported by the Division of Material Sciences, the United States Department of Energy, under Contract No. DE-AC02-76CHO0016.",

year = "1984",

month = nov,

doi = "10.1016/0038-1098(84)90736-1",

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volume = "52",

pages = "693--696",

journal = "Solid State Communications",

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TY - JOUR

T1 - "Forbidden" magnon scattering in the weak ferromagnet MnSi

AU - Sokoloff, J. B.

AU - Li, W. H.

AU - Pagonis, B.

AU - Perry, C. H.

AU - Majkrzak, C. F.

AU - Shirane, G.

AU - Ishikawa, Y.

N1 - Funding Information: Acknowledgements - This work is supported by the National Science Foundation under Grant No. DMR-8205480. The Brookhaven National Laboratory is supported by the Division of Material Sciences, the United States Department of Energy, under Contract No. DE-AC02-76CHO0016.

PY - 1984/11

Y1 - 1984/11

N2 - "Forbidden" magnon scattering (i.e. scattering in which magnons are created by increasing rather than decreasing the sample magnetization) has been observed in MnSi over the temperature range from 0.3 Tc to 2Tc in a magnetic field of 7.5 kOe. The existence of "forbidden" magnon scattering is in disagreement with theories of ferromagnetism formulated on the Random Phase Approximation. The linear behaviour of the inelastic neutron scattering intensity difference between the allowed magnon and its forbidden counterpart vs magnetization can be explained by the SKP model, which is based upon a slowly fluctuating spin density picture of itinerant ferromagnetism. Normally such behaviour is expected only for a relatively "strong" ferromagnet, but this picture seems also valid for a "weak" ferromagnet like MnSi.

AB - "Forbidden" magnon scattering (i.e. scattering in which magnons are created by increasing rather than decreasing the sample magnetization) has been observed in MnSi over the temperature range from 0.3 Tc to 2Tc in a magnetic field of 7.5 kOe. The existence of "forbidden" magnon scattering is in disagreement with theories of ferromagnetism formulated on the Random Phase Approximation. The linear behaviour of the inelastic neutron scattering intensity difference between the allowed magnon and its forbidden counterpart vs magnetization can be explained by the SKP model, which is based upon a slowly fluctuating spin density picture of itinerant ferromagnetism. Normally such behaviour is expected only for a relatively "strong" ferromagnet, but this picture seems also valid for a "weak" ferromagnet like MnSi.

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U2 - 10.1016/0038-1098(84)90736-1

DO - 10.1016/0038-1098(84)90736-1

M3 - 期刊論文

AN - SCOPUS:0021520627

VL - 52

SP - 693

EP - 696

JO - Solid State Communications

JF - Solid State Communications

SN - 0038-1098

IS - 7

ER -

"Forbidden" magnon scattering in the weak ferromagnet MnSi

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