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8 papers · 1 filter
Generalized Elliott-Yafet theory of electron spin relaxation in metals: the origin of the anomalous electron spin life-time in MgB2
F. Simon, B. Dora, F. Muranyi +6
The temperature dependence of the electron spin relaxation time in MgB2 is anomalous as it does not follow the temperature dependence of the resistivity above 150 K, it has a maxim…
Direct observation of Fe spin reorientation in single crystalline YbFe6Ge6
M. A. Avila, T. Takabatake, Y. Takahashi +2
We have grown single crystals of YbFe6Ge6 and LuFe6Ge6 and characterized their anisotropic behaviour through low field magnetic susceptibility, field-dependent magnetization, resis…
Percolation quantum phase transitions in diluted magnets
Thomas Vojta, Joerg Schmalian
We show that the interplay of geometric criticality and quantum fluctuations leads to a novel universality class for the percolation quantum phase transition in diluted magnets. Al…
Field-induced non-Fermi-liquid resistivity of stoichiometric YbAgGe single crystals
P. G. Niklowitz, G. Knebel, J. Flouquet +2
We have investigated hexagonal YbAgGe down to 70 mK by measuring the magnetic-field and temperature dependence of the resistivity rho of single crystals in fields up to 14 T. Our r…
The Role of Grain Boundaries in Determining the Transport Properties in Magnetite
David C. Mertens, W. Montfrooij, R. J. McQueeney +2
We present magnetoresistance and Hall-effect measurements on single crystal magnetite Fe3O4 close to the Verwey transition Tv = 123.8 K. We show that the formation of grain boundar…
Quantum Griffiths effects in itinerant Heisenberg magnets
Thomas Vojta, Joerg Schmalian
We study the influence of quenched disorder on quantum phase transitions in itinerant magnets with Heisenberg spin symmetry, paying particular attention to rare disorder fluctuatio…