Speaker
Dr
Martin Mansson
(Laboratory for Quantum Magnetism (LQM), EPF Lausanne)
Description
In search of a high-capacity hydrogen storage system, we have investigated the thermodynamic properties of borohydrides [M(BH4)2]. Using muon-spin rotation and relaxation (muSR), we have acquired data for five different powder samples below ambient temperature. Zero-field muSR measurements indicate the formation of the H-muon-H system in LiBH4, NaBH4, KBH4, and Ca(BH4)2 but not in Mg(BH4)2. It is also found that the amplitude of the H-muon-H signal (A) varies with the electronegativity (chi) of Mn. Since the thermodynamic stability of M(BH4)n also depends on chi, the amplitude (A) is thought to be a microscopic indicator for the stability of the M(BH4)n unit. Consequently, we can present muSR as a novel tool for investigating similar hydrogen storage materials [1].
REFERENCES
[1] J. Sugiyama, M. Mansson et al., Physical Review B, 81, 092103 (2010)
Primary author
Dr
Martin Mansson
(Laboratory for Quantum Magnetism (LQM), EPF Lausanne)
Co-authors
Prof.
Eduardo J. Ansaldo
(TRIUMF, Vancouver, Canada)
Prof.
Jess H. Brewer
(TRIUMF, UBC, Vancouver, Canada)
Dr
Jun Sugiyama
(Toyota Central Research and Developments Laboratories, Japan)
Dr
Kazutoshi Miwa
(Toyota Central Research and Development Laboratories, Japan)
Prof.
Kim H. Chow
(University of Alberta, Canada)
Dr
Oren Ofer
(TRIUMF, Vancouver, Canada)
Dr
Shin-ichi Towata
(Toyota Central Research and Development Laboratories, Japa)
Dr
Tatsuo Goko
(TRIUMF, Vancouver, Canada)
Dr
Tatsuo Noritake
(Toyota Central Research and Development Laboratories, Japan)
Dr
Yutaka Ikedo
(KEK, Japan)
