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Experimental studies of complex hydride YMn$$_{2}$$H$$_{6}$$ on formation kinetics and X-ray absorption fine structure analyses

Matsuo, Motoaki*; Matsumura, Daiju   ; Nishihata, Yasuo; Li, G.*; Hiyama, Nao*; Semboshi, Satoshi*; Orimo, Shinichi*

Formation kinetics of a complex hydride YMn$$_{2}$$H$$_{6}$$ with MnH$$_{6}$$ complex anion from a metal hydride YMn$$_{2}$$H$$_{4.5}$$ was investigated in the temperature range between 373 K and 448 K under 25 MPa H$$_{2}$$. The time dependent of the YMn$$_{2}$$H$$_{6}$$ formation fraction suggested that the formation kinetics are controlled by random nucleation and growth with the activation energy of 113 kJ/mol H$$_{2}$$. Local structure of YMn$$_{2}$$H$$_{6}$$ synthesized was also studied by X-ray absorption fine structure analysis. Mn-H covalent bonding nature in MnH$$_{6}$$ complex anion was successfully detected and the Mn-H distance was determined to be 1.67$$pm$$0.05 ${AA}$.

Language

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English

Journal

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Applied Physics Letters

Volume

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100

Number

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4

Pages

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p.044101_1 - 044101_3

Publication Year/Month

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2012/01

Meeting title

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Held date

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Location (city)

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1063/1.3678032

DOI for research data

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Keywords

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no keyword

Research Facility

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SPring-8(大型放射光施設)

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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東北大学

Accesses

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- Accesses

InCites™

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Percentile:18.19

Category:Physics, Applied

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