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Pressure‐induced polyamorphism in lanthanide‐solute metallic glasses (Phys. Status Solidi RRL 6/2017)
Author(s) -
Li Liangliang,
Wang Luhong,
Li Renfeng,
Qu Dongdong,
Zhao Haiyan,
Chapman Karena W.,
Chupas Peter J.,
Liu Haozhe
Publication year - 2017
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201770332
Subject(s) - lanthanide , polyamorphism , materials science , metal , amorphous metal , thermodynamics , chemical physics , crystallography , chemistry , amorphous solid , metallurgy , organic chemistry , physics , ion
Previous reports of pressure‐induced polyamorphism in lanthanide‐based metallic glasses proposed a mechanism where electronic transitions inherit lanthanide‐solvent atoms. However, is a polyamorphic transformation possible in lanthanide‐solute metallic glasses? Here (see article no. 1700078) , using in situ synchrotron X‐ray high‐energy scattering and pair distribution function (PDF) methods, a pressure‐induced transition from a low‐density state to high‐density state accompanied by a volume collapse (as shown in the upper figure on the back cover) was discovered in La 43.4 Pr 18.6 Al 14 Cu 24 metallic glass, with a low lanthanide content. The changes in the short‐range and medium‐range order also embody this transformation, which is demonstrated by the two lower figures for the differential S(Q) and PDF in the reciprocal and real spaces, respectively. The polyamorphic transition in the metallic glasses containing lanthanide (not only lanthanide‐solvents but also lanthanidesolutes), is inherited from the crystalline polymorphic transitions related to the 4 f electronic state. This discovery supplements research on lanthanide‐based metallic glasses, which further offers a new perspective of the polyamorphic transformation in metallic glasses under high‐pressure conditions.