title: High-pressure single-crystal synchrotron diffraction study of MnGe and related compounds.
abstract: Single crystal synchrotron diffraction for pressures up to 50 GPa has revealed an essential difference in structural properties and compressibility of MnGe compared with Mn1-xCoxGe and Mn1-xFexGe solid solutions. A negative thermal expansion has been observed for MnGe at low-temperatures and high-pressures. The single crystal refinement has shown a discontinuous change of the atomic coordinates and Mn-Ge interatomic distances of MnGe in contrast to Mn0.1Co0.9Ge. These peculiarities of MnGe are likely to be associated with high-spin-low-spin transition. The relation between anisotropy of the coordination of Mn-atom and its magnetic moment is discussed.
authors.affiliation: Saint Petersburg State University, 7/9 Universitetskaya nab., 199034 Saint-Petersburg, Russia.
authors.forename: G A
authors.initials: GA
authors.lastname: Valkovskiy
authors.forename: E G
authors.initials: EG
authors.lastname: Yashina
authors.forename: V A
authors.initials: VA
authors.lastname: Dyadkin
authors.forename: A V
authors.initials: AV
authors.lastname: Tsvyashchenko
authors.forename: L N
authors.initials: LN
authors.lastname: Fomicheva
authors.forename: M
authors.initials: M
authors.lastname: Bykov
authors.forename: E
authors.initials: E
authors.lastname: Bykova
authors.forename: L
authors.initials: L
authors.lastname: Dubrovinsky
authors.forename: D
authors.initials: D
authors.lastname: Yu Chernyshov
authors.forename: S V
authors.initials: SV
authors.lastname: Grigoriev