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1 Pure Metals   increases linearly with increasing temperature  For T  0:   constant Theory Matthiessen's rule.

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Presentation on theme: "1 Pure Metals   increases linearly with increasing temperature  For T  0:   constant Theory Matthiessen's rule."— Presentation transcript:

1 1 Pure Metals   increases linearly with increasing temperature  For T  0:   constant Theory Matthiessen's rule

2 2 Alloys

3 Impurities and Dislocations 3 Molybdenum D. Rafaja, H. Köstenbauer, U. Mühle, C. Löffler, G. Schreiber, M. Kathrein, J. Winkler: Effect of the deposition process and substrate temperature on the microstructure defects and electrical conductivity of molybdenum thin films, Thin Solid Films 528 (2013)

4 4 Atomic Ordering in Alloys

5 5 Atomic Ordering in Au-Cu X-ray diffraction – additional diffraction lines AuCu, P4/mmmAuCu 3, Pm3mAu 3 Cu, Pm3m Au-Cu, Fm3m

6 6 Electrical Conductivity of Er(Co 1-x Ge x ) 2 S. Daniš, P. Javorský, D. Rafaja and V. Sechovský: Low-temperature transport and crystallographic studies of Er(Co 1-x Si x ) 2 and Er(Co 1-x Ge x ) 2, J. Alloys Comp. 345 (2002)

7 7 Lattice Parameter of Er(Co 1-x Si x ) 2 S. Daniš, P. Javorský, D. Rafaja and V. Sechovský: Low- temperature transport and crystallographic studies of Er(Co 1-x Si x ) 2 and Er(Co 1-x Ge x ) 2, J. Alloys Comp. 345 (2002) ErCo 2 Cubic structure (Fd3m)  Rhombic deformation  Magnetic ordering  Change in resistance 33 K

8 8 Crystal Structure of ErCo 2 {111} direction Co Er ErCo 2, SG: Fd3m Er (8a): (0,0,0) Co (16d): (5/8, 5/8, 5/8)

9 9 Kondo Effect electrical resistivity,  cm Spin contribution: J. Kondo: Prog. Theor. Phys. 32 (1964) 37. alloys: Cu, Ag, Au, Mn, Zn doped with: Cr, Mn, Fe phononsspin Deviation from Matthiessen's rule electrical resistivity,  cm


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