TY  - JOUR
AU  - Wencka, M.
AU  - Jazbec, S.
AU  - Jagli, Z.
AU  - Vrtnik, M.
AU  - Feuerbacher, M.
AU  - Heggen, M.
AU  - Roitsch, S.
AU  - Dolinsek, J.
TI  - Electrical resistivity of the u-Al4Mn giant-unit-cell complex metallic alloy
JO  - Philosophical magazine  / A
VL  - 91
SN  - 0141-8610
CY  - London [u.a.]
PB  - Taylor and Francis
M1  - PreJuSER-18702
PY  - 2011
N1  - This work was performed within the 6th Framework EU Network of Excellence "Complex Metallic Alloys" (Contract No. NMP3-CT-2005-500140). J.D. acknowledges support from the Centre of Excellence EN -> FIST, Dunajska 156, SI-1000 Ljubljana, Slovenia.
AB  - The mu-Al4Mn complex intermetallic phase with 563 atoms in its giant unit cell exhibits a complicated temperature dependence of electrical resistivity that has a broad maximum at about 175 K and a minimum at 13 K. The temperature dependence of the resistivity was reproduced by employing the theory of quantum transport of slow charge carriers, which predicts a crossover from the metallic (Boltzmann-type) positive-temperature-coefficient electrical resistivity at low temperatures to the insulator-like (non-Boltzmann) negative-temperature-coefficient resistivity at elevated temperatures. The low-temperature resistivity minimum was reproduced by considering it as a magnetic effect due to increased scattering of the conduction electrons by the Mn spins on approaching the spin glass phase that develops below the spin freezing temperature T-f = 2.7 K.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000290670100041
DO  - DOI:10.1080/14786435.2010.512578
UR  - https://juser.fz-juelich.de/record/18702
ER  -