[Zurück]

P. Schmakat, M. Wagner, R. Ritz, A. Bauer, M. Brando, M. Deppe, W. Duncan, C. Duvinage, C. Franz, C. Geibel, M. Grosche, M. Hirschberger, K. Hradil, M. Meven, A. Neubauer, M. Schulz, A. Senyshyn, S. Süllow, B. Pedersen, P. Böni, C. Pfleiderer:
"Spin dynamics and spin freezing at ferromagnetic quantum phase transitions";
European Physical Journal - Special Topics, 224 (2015), 6; S. 1041 - 1060.

We report selected experimental results on the spin dynamics and spin freezing at ferromagnetic quantum phase transitions to illustrate some of the most prominent escape routes by which ferromagnetic quantum criticality is avoided in real materials. In the
transition metal Heusler compound Fe2TiSn we observe evidence for
incipient ferromagnetic quantum criticality. High pressure studies in
MnSirevealempiricalevidenceforatopologicalnon-Fermiliquidstate
without quantum criticality. Single crystals of the hexagonal Laves
phase compound Nb1−Fe2+y provide evidence of a ferromagnetic
to spin density wave transition as a function of slight compositional
changes. Last but not least, neutron depolarisation imaging in
CePd1−xRhx underscore evidence taken from the bulk properties of
the formation of a Kondo cluster glass.

Spin dynamics, ferromagnetism, phase transitions

http://dx.doi.org/10.1140/epjst/e2015-02445-5