title: General 2.5 power law of metallic glasses.
abstract: Metallic glass (MG) is an important new category of materials, but very few rigorous laws are currently known for defining its "disordered" structure. Recently we found that under compression, the volume (V) of an MG changes precisely to the 2.5 power of its principal diffraction peak position (1/q1). In the present study, we find that this 2.5 power law holds even through the first-order polyamorphic transition of a Ce68Al10Cu20Co2 MG. This transition is, in effect, the equivalent of a continuous "composition" change of 4f-localized "big Ce" to 4f-itinerant "small Ce," indicating the 2.5 power law is general for tuning with composition. The exactness and universality imply that the 2.5 power law may be a general rule defining the structure of MGs.
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Department of Geological Sciences, Stanford University, Stanford, CA 94305; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439; qzeng@carnegiescience.edu hmao@carnegiescience.edu.
authors.forename: Qiaoshi
authors.initials: Q
authors.lastname: Zeng
authors.affiliation: Department of Geological Sciences, Stanford University, Stanford, CA 94305;
authors.forename: Yu
authors.initials: Y
authors.lastname: Lin
authors.affiliation: Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
authors.forename: Yijin
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Department of Geological Sciences, Stanford University, Stanford, CA 94305; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
authors.forename: Zhidan
authors.initials: Z
authors.lastname: Zeng
authors.affiliation: Department of Geological Sciences, Stanford University, Stanford, CA 94305;
authors.forename: Crystal Y
authors.initials: CY
authors.lastname: Shi
authors.affiliation: School of Materials Science and Engineering & Anhui Provincial Key Lab of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, China;
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China;
authors.forename: Hongbo
authors.initials: H
authors.lastname: Lou
authors.affiliation: High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
authors.forename: Stanislav V
authors.initials: SV
authors.lastname: Sinogeikin
authors.affiliation: High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Kono
authors.affiliation: High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
authors.forename: Curtis
authors.initials: C
authors.lastname: Kenney-Benson
authors.affiliation: High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
authors.forename: Changyong
authors.initials: C
authors.lastname: Park
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439;
authors.forename: Wenge
authors.initials: W
authors.lastname: Yang
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
authors.forename: Weihua
authors.initials: W
authors.lastname: Wang
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; Department of Physics and Astronomy, George Mason University, Fairfax, VA 22030.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Sheng
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, People's Republic of China; High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439; High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439; qzeng@carnegiescience.edu hmao@carnegiescience.edu.
authors.forename: Ho-Kwang
authors.initials: HK
authors.lastname: Mao
authors.affiliation: Department of Geological Sciences, Stanford University, Stanford, CA 94305; Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025;
authors.forename: Wendy L
authors.initials: WL
authors.lastname: Mao
keywords: atomic packing; composition effect; general structure–property relationship; polyamorphic transition; pressure effect
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