Structural Signature of β-Relaxation in La-Based Metallic Glasses

The Journal of Physical Chemistry Letters
X D WangJ Z Jiang

Abstract

The secondary β-relaxation is an intrinsic feature in glassy materials. However, its structural origin is still not well understood. Here we report that the β-relaxations in La50Al15Ni35 and La50Al15Cu35 metallic glasses (MGs) mainly depend on the vibration of small Ni and Cu atoms in local cages. By using advanced synchrotron X-ray techniques and theoretical calculations, we elucidate that the tricapped-trigonal-prism-like polyhedra with more large La atoms in shells favor the local vibration of center Ni atoms, leading to the pronounced β-relaxation event. In contrast, the in-cage vibration of Cu atoms is somehow suppressed by the appearance of more shell Cu atoms. Nevertheless, they could easily diffuse out of the cages compared with Ni, thus triggering the onset of α-relaxation. This work provides a pathway to understand the different structural relaxation behaviors in MGs and other disordered materials from their local atomic packing and dynamics points of view.

References

Aug 22, 2001·Journal of Synchrotron Radiation·M Newville
Sep 13, 2002·Physical Review Letters·Francis W StarrSharon C Glotzer
Mar 5, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Hajime Tanaka
Jul 23, 2004·The Journal of Chemical Physics·K L Ngai, M Paluch
Jan 1, 2009·Nature Physics·Jacob D Stevenson, Peter G Wolynes
Mar 23, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Z WangW H Wang
Feb 7, 2012·Physical Review Letters·H B YuH Y Bai
Jul 26, 2013·Nature Communications·Hai Bin YuHai Yang Bai
Feb 4, 2014·Nature Communications·Y H LiuM W Chen
Mar 15, 2012·The Journal of Physical Chemistry Letters·S CapaccioliK L Ngai

❮ Previous
Next ❯

Citations

Jan 9, 2021·The Journal of Physical Chemistry. B·Xingyu GongJian-Zhong Jiang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Z WangW H Wang
The Journal of Chemical Physics
L Z ZhaoH Y Bai
Proceedings of the National Academy of Sciences of the United States of America
H B LouJian-Zhong Jiang
© 2022 Meta ULC. All rights reserved