Properties of polyamorphous Ce{sub 75}Al{sub 25} metallic glasses

Journal Article · Sun Aug 01 00:00:00 EDT 2010 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.82.054111· OSTI ID:21421383

Zeng, Q S ^[1]; Struzhkin, V V ^[2]; Fang, Y Z ^[3]; Gao, C X ^[4]; Luo, H B; Wang, X D; Jiang, J Z ^[1]; Lathe, C ^[5]; Mao, Wendy L ^[1]; Wu, F M ^[3]

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1. International Center for New-Structured Materials (ICNSM), Zhejiang University, Hangzhou 310027 (China)
2. Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015 (United States)
3. College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, Jinhua 321004 (China)
4. State Key Lab for Superhard Materials, Jilin University, Changchun 130012 (China)
5. HASYLAB am DESY, Notkestrasse 85, D-22603 Hamburg (Germany)

The thermal stability and electronic transport properties of polyamorphous Ce{sub 75}Al{sub 25} metallic glass (MG) have been investigated using in situ high-pressure, high-temperature, energy-dispersive synchrotron x-ray diffraction and in situ high-pressure and low-temperature, four-probe resistance measurements. The results are compared with the properties of La{sub 75}Al{sub 25} MG. The pressure dependence of the crystallization temperature and resistance of the Ce{sub 75}Al{sub 25} MG exhibited turning points at the polyamorphic transition pressure, 1.5 GPa, and they clearly presented different behaviors below and above 1.5 GPa. In contrast, no turning points were observed in the La{sub 75}Al{sub 25} MG (La has no 4f electron). Additionally, the pressure-tuned temperature coefficient of resistance of the Ce{sub 75}Al{sub 25} MG was observed. These results revealed switchable properties in the polyamorphous Ce{sub 75}Al{sub 25} MG that are linked with 4f electron delocalization.

• OSTI ID: 21421383
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 82, Issue 5; Other Information: DOI: 10.1103/PhysRevB.82.054111; (c) 2010 The American Physical Society; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
AMORPHOUS STATE
CARRIER MOBILITY
CERIUM ALLOYS
CRYSTALLIZATION
ELECTRIC CONDUCTIVITY
METALLIC GLASSES
PHASE TRANSFORMATIONS
PRESSURE DEPENDENCE
PRESSURE RANGE GIGA PA
STABILITY
SYNCHROTRON RADIATION
TEMPERATURE COEFFICIENT
X-RAY DIFFRACTION
ALLOYS
BREMSSTRAHLUNG
COHERENT SCATTERING
DIFFRACTION
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
MOBILITY
PHYSICAL PROPERTIES
PRESSURE RANGE
RADIATIONS
RARE EARTH ALLOYS
REACTIVITY COEFFICIENTS
SCATTERING