TY - JOUR
T1 - Myriad of correlated electron effects found in the RT2 Zn20 family
AU - Canfield, P. C.
AU - Jia, S.
AU - Mun, E. D.
AU - Bud'ko, S. L.
AU - Samolyuk, G. D.
AU - Torikachvili, M. S.
PY - 2008/4/1
Y1 - 2008/4/1
N2 - The dilute, rare earth bearing family of RT2 Zn20 (R = rare earth, T = transition metal) intermetallic compounds can be tuned to a nearly ferromagnetic Fermi liquid that is closer to the Stoner limit than Pd (for R = Y, Lu and T = Fe). The submersion of moment bearing rare earths (Gd-Tm) into this highly polarizable matrix gives rise to exceptionally high temperature ferromagnetism (e.g. TC = 86 K for GdFe2 Zn20) for a compound with only one moment bearing ion out of 23 in the formula unit. In addition to this d-shell correlated electron behavior, 4f hybridization gives rise to six, new, Yb-based heavy fermion compounds: YbT2 Zn20 (T = Fe, Ru, Os, Co, Rh, Ir). These half dozen compounds manifest a range of Yb ion degeneracy values (N) for T ∼ TK, ranging from N = 4 - 8. Not only do these compounds offer a clear testing ground for the effects of low temperature degeneracy on the correlated electron state, they also present an exceptionally clear experimental confirmation of the generalized Kadowaki-Woods formalism.
AB - The dilute, rare earth bearing family of RT2 Zn20 (R = rare earth, T = transition metal) intermetallic compounds can be tuned to a nearly ferromagnetic Fermi liquid that is closer to the Stoner limit than Pd (for R = Y, Lu and T = Fe). The submersion of moment bearing rare earths (Gd-Tm) into this highly polarizable matrix gives rise to exceptionally high temperature ferromagnetism (e.g. TC = 86 K for GdFe2 Zn20) for a compound with only one moment bearing ion out of 23 in the formula unit. In addition to this d-shell correlated electron behavior, 4f hybridization gives rise to six, new, Yb-based heavy fermion compounds: YbT2 Zn20 (T = Fe, Ru, Os, Co, Rh, Ir). These half dozen compounds manifest a range of Yb ion degeneracy values (N) for T ∼ TK, ranging from N = 4 - 8. Not only do these compounds offer a clear testing ground for the effects of low temperature degeneracy on the correlated electron state, they also present an exceptionally clear experimental confirmation of the generalized Kadowaki-Woods formalism.
KW - Fermi-liquid
KW - Heavy fermions
KW - Kadowaki-Woods plot
KW - Stoner limit
UR - http://www.scopus.com/inward/record.url?scp=39849106766&partnerID=8YFLogxK
U2 - 10.1016/j.physb.2007.10.234
DO - 10.1016/j.physb.2007.10.234
M3 - Article
AN - SCOPUS:39849106766
SN - 0921-4526
VL - 403
SP - 844
EP - 846
JO - Physica B: Physics of Condensed Matter
JF - Physica B: Physics of Condensed Matter
IS - 5-9
ER -