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Sm valence states and magnetic properties in SmBe13 and SmTi2Al20 investigated by Sm synchrotron-radiation-based Mössbauer spectroscopy

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Abstract

Synchrotron-Radiation-based \(^{\mathrm {149}}\)Sm Mössbauer spectroscopy was applied to Sm intermetallics, SmBe13 and SmTi2Al20. Temperature dependence of the Mössbauer parameters in SmBe13 indicate the Sm valence state is purely trivalent. SmBe13 also showed second-order Doppler shift in synchrotron-radiation-based \(^{\mathrm {149}}\)Sm Mössbauer spectroscopy. The Mössbauer parameters obtained in SmTi2Al20 suggest that the Sm valence is fluctuating and the magnitude of the magnetic moment is reduced by hybridization between 4f and conduction electrons and/or effect of crystal electric field.

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Acknowledgements

The authors thank Dr. M. Mizumaki for fruitful discussion with him and Dr. Y. Kobayashi and Dr. R. R. Masuda, Prof. H. Kobayashi for their experimental assistance, and Prof. Julian R. Koe for his kind English correction. The present work was carried out under approval of JASRI (Proposal Nos. 2015A2036, 2015B1947, 2016A1281, 2016B1057, 2016B1967, 2017A1060). This work is partially supported by Grant-in-Aid for the Scientific Research on Innovative Area of J-Physics (Grant Nos. 15H05882, 15H05884, 15H05885) from the MEXT and Grant-in-Aids for Scientific Research S (Grant No. 20224015), Scientific Research B (Grants Nos. 15H03693, 15H0397), Scientific C (Grant Nos. 25400346, 26400342, 15K05178, 16K05454) and Challenging Exploratory Research (Grants No. 15K14170). One of the authors (AY) was supported by Grant-in-Aid for JSPS Research Fellow (Grants No. 15J07600).

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Correspondence to Satoshi Tsutsui.

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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2017), Saint-Petersburg, Russia, 3-8 September 2017

Edited by Valentin Semenov

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Tsutsui, S., Kobayashi, Y., Nakamura, J. et al. Sm valence states and magnetic properties in SmBe13 and SmTi2Al20 investigated by Sm synchrotron-radiation-based Mössbauer spectroscopy. Hyperfine Interact 238, 100 (2017). https://doi.org/10.1007/s10751-017-1473-z

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