Electronic properties of a new class of aluminum-based metallic glasses: Al/sub 100/minus//ital x//minus//ital y//(/ital T/)/sub /ital x//(La,Y)/sub /ital y// with /ital T/=Fe, Co, Ni, and Cu

Journal Article · Sat Jul 15 04:00:00 EDT 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.40.1345· OSTI ID:6095712

Pont, M; Gonzalo, J; Rao, K V; Inoue, A

Electrical and Hall resistivity studies have been carried out on a newclass of melt-spun, Al-/ital T/-/ital R/, Al-rich (above 75 at. %) ternaryamorphous alloys in order to study the possible correlation between theirelectronic and enhanced mechanical properties. We find for all these alloys(over 26 of them) the room-temperature Hall coefficient has a /ital negative/sign and increases significantly in magnitude with the (/ital T/-/ital R/)content, which indicates a decrease in the effective carrier concentration.This is consistent with the suggestion that the observed remarkable mechanicalproperties in these alloys are due to the enhanced strength of the additionallocal Al-/ital T/ and AL-/ital R/ bonds. In these alloys the electricalresistivity at room temperature increases from about 65 ..mu cap omega.. cm for thebinary Al/sub 90/(/ital R/)/sub 10/ amorphous alloys to over 250..mu cap omega.. cm on further substitution of Al with less than 15 at. % of/ital T/ elements. From a systematic study the importance of /ital s/-/ital d/scattering mechanism and a crossover in the electronic properties from /ital s/-to /ital d/-band amorphous metal with /ital T/ substitution are discussed.

• Research Organization: Department of Solid State Physics, Royal Institute of Technology, S-100 44 Stockholm, Sweden(JP); Department of Solid State Physics, Royal Institute of Technology, S-100 44 Stockholm, Sweden; Institute for Materials Research, Tohoku University, Sendai, Miyagi 980, Japan
• OSTI ID: 6095712
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 40:2; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
COBALT ALLOYS
COPPER ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
HALL EFFECT
IRON ALLOYS
LANTHANUM ALLOYS
MEDIUM TEMPERATURE
METALLIC GLASSES
NICKEL ALLOYS
PHYSICAL PROPERTIES
QUANTITY RATIO
RARE EARTH ALLOYS
YTTRIUM ALLOYS