Magnetoconductiivity of icosahedral AIPdRe at temperatures between 50-250 Kelvin
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
The electrical conductivity of icosahedral Al70:5Pd21Re8:5 samples with residual resistance ratio RRR = p(4:2K)=p(295K), in the range from 10 to 220 are reported. The samples were manufactured by melting in an arc furnace and then annealed at 940 °C. One of the samples (RRR=10) was made by melt spinning. In this work, the magnetoresistance, MR, and resistivity, p(T), of the samples with RRR values 10, 31, 71 and 220 has been measured in the temperature range from 50 K to 250 K and the magnetic field up to 12 Tesla. The electronic transport properties of the sample Al-Pd-Re strongly depend upon temperature. The p(T) increases with decreasing temperature. The MR of the sample is larger than the MR of most metals. At 50 K, MR increases with increasing magnetic field for samples with RRR value of 10, 31 and 220. At 100 K and 175 K, MR decreases with increasing magnetic field. But MR at 100 K decreases more than MR at 175 K. At 250 K, MR increases even more than MR at 50 K, which is very strange behaviour. Sample with RRR value 71, MR behaviour is quite different from remaining samples. MR of this sample decreases with increasing field, at decreases more at 175 K and less at 250 K. The present samples show high MR at temperature (100-250 K) as compared with Al-Cu-Fe.
Place, publisher, year, edition, pages
2013. , 32 p.
Computer and Information Science
IdentifiersURN: urn:nbn:se:kth:diva-143196OAI: oai:DiVA.org:kth-143196DiVA: diva2:705897
Subject / course
Microelectronics and Applied Physics
Master of Science - Nanotechnology
Andersson, Magnus, Assistent Professor