Possible weak magnetism in MB6 (M:Ca, Ba) probed by muon spin relaxation and muon level-crossing resonance

S. Kuroiwa; H. Takagiwa; M. Yamazawa; J. Akimitsu; A. Koda; R. Kadono; K. Ohishi; W. Higemoto; I. Watanabe

doi:10.1016/j.stam.2005.11.012

Possible weak magnetism in MB₆ (M:Ca, Ba) probed by muon spin relaxation and muon level-crossing resonance

S. Kuroiwa, H. Takagiwa, M. Yamazawa, J. Akimitsu, A. Koda, R. Kadono, K. Ohishi, W. Higemoto, I. Watanabe

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

4 Citations (Scopus)

Abstract

The temperature dependence of muon spin relaxation rate exhibits a significant increase below ∼130 K in CaB₆ and ∼110 K in BaB₆, while no sigh of spontaneous muon precession signal under a zero field is observed. Moreover, the electric field gradient at the boron site measured by muon level-crossing resonance (μLCR) exhibits a step like change at ∼110 K in CaB₆. These results suggest a change in electronic state and the associated emergence of weak random magnetism below 110-130 K in these alkaline earth hexaborides.

Original language	English
Pages (from-to)	12-16
Number of pages	5
Journal	Science and Technology of Advanced Materials
Volume	7
Issue number	1 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.stam.2005.11.012
Publication status	Published - Jan 2006
Externally published	Yes

Keywords

BaB
CaB
Hexaboride
Muon level-crossing resonance (μLCR)
Muon spin relaxation (μSR)

ASJC Scopus subject areas

Materials Science(all)

Access to Document

10.1016/j.stam.2005.11.012

Cite this

@article{5998ded206aa4f3e8bb8d2a2e24411b3,

title = "Possible weak magnetism in MB6 (M:Ca, Ba) probed by muon spin relaxation and muon level-crossing resonance",

abstract = "The temperature dependence of muon spin relaxation rate exhibits a significant increase below ∼130 K in CaB6 and ∼110 K in BaB6, while no sigh of spontaneous muon precession signal under a zero field is observed. Moreover, the electric field gradient at the boron site measured by muon level-crossing resonance (μLCR) exhibits a step like change at ∼110 K in CaB6. These results suggest a change in electronic state and the associated emergence of weak random magnetism below 110-130 K in these alkaline earth hexaborides.",

keywords = "BaB, CaB, Hexaboride, Muon level-crossing resonance (μLCR), Muon spin relaxation (μSR)",

author = "S. Kuroiwa and H. Takagiwa and M. Yamazawa and J. Akimitsu and A. Koda and R. Kadono and K. Ohishi and W. Higemoto and I. Watanabe",

note = "Funding Information: We thank all the staff of KEK-MSL, TRIUMF and RIKEN-RAL μSR for their technical support. The Aoyama-Gakuin University group was partially supported by a Grant-in-Aid for the 21st COE Program from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government.",

year = "2006",

month = jan,

doi = "10.1016/j.stam.2005.11.012",

language = "English",

volume = "7",

pages = "12--16",

journal = "Science and Technology of Advanced Materials",

issn = "1468-6996",

publisher = "IOP Publishing Ltd.",

number = "1 SPEC. ISS.",

}

TY - JOUR

T1 - Possible weak magnetism in MB6 (M:Ca, Ba) probed by muon spin relaxation and muon level-crossing resonance

AU - Kuroiwa, S.

AU - Takagiwa, H.

AU - Yamazawa, M.

AU - Akimitsu, J.

AU - Koda, A.

AU - Kadono, R.

AU - Ohishi, K.

AU - Higemoto, W.

AU - Watanabe, I.

N1 - Funding Information: We thank all the staff of KEK-MSL, TRIUMF and RIKEN-RAL μSR for their technical support. The Aoyama-Gakuin University group was partially supported by a Grant-in-Aid for the 21st COE Program from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government.

PY - 2006/1

Y1 - 2006/1

N2 - The temperature dependence of muon spin relaxation rate exhibits a significant increase below ∼130 K in CaB6 and ∼110 K in BaB6, while no sigh of spontaneous muon precession signal under a zero field is observed. Moreover, the electric field gradient at the boron site measured by muon level-crossing resonance (μLCR) exhibits a step like change at ∼110 K in CaB6. These results suggest a change in electronic state and the associated emergence of weak random magnetism below 110-130 K in these alkaline earth hexaborides.

AB - The temperature dependence of muon spin relaxation rate exhibits a significant increase below ∼130 K in CaB6 and ∼110 K in BaB6, while no sigh of spontaneous muon precession signal under a zero field is observed. Moreover, the electric field gradient at the boron site measured by muon level-crossing resonance (μLCR) exhibits a step like change at ∼110 K in CaB6. These results suggest a change in electronic state and the associated emergence of weak random magnetism below 110-130 K in these alkaline earth hexaborides.

KW - BaB

KW - CaB

KW - Hexaboride

KW - Muon level-crossing resonance (μLCR)

KW - Muon spin relaxation (μSR)

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JO - Science and Technology of Advanced Materials

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