A μ SR magnetic study of UNiGe

G. M. Kalvius; D. R. Noakes; S. El-Khatib; E. J. Ansaldo; C. E. Stronach; E. Brück; H. Nakotte

doi:10.1016/j.jallcom.2006.09.119

A μ SR magnetic study of UNiGe

G. M. Kalvius, D. R. Noakes, S. El-Khatib, E. J. Ansaldo, C. E. Stronach, E. Brück, H. Nakotte

Chemical Engineering and Materials Science

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

1 Scopus citations

Abstract

We have carried out μ SR spectroscopy on polycrystalline UNiGe between 2 K and 100 K. The existence of two magnetic transitions at T_N = 51 K and T₁ = 41.5 K is confirmed. The μ SR spectra clearly reveal that the magnetic state between 51 K and 41.5 K is an incommensurate spin structure ruling out a spin-slip structure which had been considered an alternative. Below 41.5 K the spectra are compatible with simple antiferromagnetic order. The local field for T → 0 is B_μ = 170 mT, a comparatively low value, indicating a rather small uranium ordered moment. When going from the commensurate to the incommensurate structures at T₁ a sudden reduction in local field by 23% occurs reflecting an equal change in ordered moment. The transition at T₁ is sharp, but T_N extends over roughly 5 K. The antiferromagnetic spin structure exhibits persistent spin fluctuations in the limit T → 0, implying the presence of some additional spin interactions which tries to suppress long-range magnetic order.

Original language	English (US)
Pages (from-to)	11-18
Number of pages	8
Journal	Journal of Alloys and Compounds
Volume	441
Issue number	1-2
DOIs	https://doi.org/10.1016/j.jallcom.2006.09.119
State	Published - Aug 30 2007

Bibliographical note

Funding Information:
Part of the work was supported by a grant from NSF (grant number: DMR-0094241). We thank S. Kreitzman, B. Hitti and D. Arsenau (TRIUMF) for assistance during the measurements.

Keywords

Antiferromagnetism
Muon spin rotation
Uranium intermetallics

Publisher link

10.1016/j.jallcom.2006.09.119

Find It

Find It at U of M Libraries

Cite this

@article{b51b09d14e784b1aa65e039849270b1d,

title = "A μ SR magnetic study of UNiGe",

abstract = "We have carried out μ SR spectroscopy on polycrystalline UNiGe between 2 K and 100 K. The existence of two magnetic transitions at TN = 51 K and T1 = 41.5 K is confirmed. The μ SR spectra clearly reveal that the magnetic state between 51 K and 41.5 K is an incommensurate spin structure ruling out a spin-slip structure which had been considered an alternative. Below 41.5 K the spectra are compatible with simple antiferromagnetic order. The local field for T → 0 is Bμ = 170 mT, a comparatively low value, indicating a rather small uranium ordered moment. When going from the commensurate to the incommensurate structures at T1 a sudden reduction in local field by 23% occurs reflecting an equal change in ordered moment. The transition at T1 is sharp, but TN extends over roughly 5 K. The antiferromagnetic spin structure exhibits persistent spin fluctuations in the limit T → 0, implying the presence of some additional spin interactions which tries to suppress long-range magnetic order.",

keywords = "Antiferromagnetism, Muon spin rotation, Uranium intermetallics",

author = "Kalvius, {G. M.} and Noakes, {D. R.} and S. El-Khatib and Ansaldo, {E. J.} and Stronach, {C. E.} and E. Br{\"u}ck and H. Nakotte",

note = "Funding Information: Part of the work was supported by a grant from NSF (grant number: DMR-0094241). We thank S. Kreitzman, B. Hitti and D. Arsenau (TRIUMF) for assistance during the measurements.",

year = "2007",

month = aug,

day = "30",

doi = "10.1016/j.jallcom.2006.09.119",

language = "English (US)",

volume = "441",

pages = "11--18",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

number = "1-2",

}

TY - JOUR

T1 - A μ SR magnetic study of UNiGe

AU - Kalvius, G. M.

AU - Noakes, D. R.

AU - El-Khatib, S.

AU - Ansaldo, E. J.

AU - Stronach, C. E.

AU - Brück, E.

AU - Nakotte, H.

N1 - Funding Information: Part of the work was supported by a grant from NSF (grant number: DMR-0094241). We thank S. Kreitzman, B. Hitti and D. Arsenau (TRIUMF) for assistance during the measurements.

PY - 2007/8/30

Y1 - 2007/8/30

N2 - We have carried out μ SR spectroscopy on polycrystalline UNiGe between 2 K and 100 K. The existence of two magnetic transitions at TN = 51 K and T1 = 41.5 K is confirmed. The μ SR spectra clearly reveal that the magnetic state between 51 K and 41.5 K is an incommensurate spin structure ruling out a spin-slip structure which had been considered an alternative. Below 41.5 K the spectra are compatible with simple antiferromagnetic order. The local field for T → 0 is Bμ = 170 mT, a comparatively low value, indicating a rather small uranium ordered moment. When going from the commensurate to the incommensurate structures at T1 a sudden reduction in local field by 23% occurs reflecting an equal change in ordered moment. The transition at T1 is sharp, but TN extends over roughly 5 K. The antiferromagnetic spin structure exhibits persistent spin fluctuations in the limit T → 0, implying the presence of some additional spin interactions which tries to suppress long-range magnetic order.

AB - We have carried out μ SR spectroscopy on polycrystalline UNiGe between 2 K and 100 K. The existence of two magnetic transitions at TN = 51 K and T1 = 41.5 K is confirmed. The μ SR spectra clearly reveal that the magnetic state between 51 K and 41.5 K is an incommensurate spin structure ruling out a spin-slip structure which had been considered an alternative. Below 41.5 K the spectra are compatible with simple antiferromagnetic order. The local field for T → 0 is Bμ = 170 mT, a comparatively low value, indicating a rather small uranium ordered moment. When going from the commensurate to the incommensurate structures at T1 a sudden reduction in local field by 23% occurs reflecting an equal change in ordered moment. The transition at T1 is sharp, but TN extends over roughly 5 K. The antiferromagnetic spin structure exhibits persistent spin fluctuations in the limit T → 0, implying the presence of some additional spin interactions which tries to suppress long-range magnetic order.

KW - Antiferromagnetism

KW - Muon spin rotation

KW - Uranium intermetallics

UR - http://www.scopus.com/inward/record.url?scp=34250338465&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34250338465&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2006.09.119

DO - 10.1016/j.jallcom.2006.09.119

M3 - Article

AN - SCOPUS:34250338465

SN - 0925-8388

VL - 441

SP - 11

EP - 18

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1-2

ER -

A μ SR magnetic study of UNiGe

Abstract

Bibliographical note

Keywords

Publisher link

Find It

Other files and links

Fingerprint

Cite this