Short-range magnetic correlations in geometrically frustrated CePdAl
Geometrically frustrated CePdAl orders antiferromagnetically below 2.7 K in an incommensurate structure. Doping Ni on the Pd site lowers in Ce(Pd,Ni)Al the ordering temperature and for a Ni content of 0.14 the transition is fully suppressed and a quantum phase transition approached with unusual low temperature properties. In a previous experiment on the parent compound CePdAl on D10 we established that 2/3 of the cerium moments exhibit long-range antiferromagnetic order, while 1/3 of the cerium moments show only short-range correlations. These short-range correlations show some peculiar temperature dependence. We want to study the momentum space dependence of these correlations and look for possible anisotropies. We ask for 5 days of beamtime on the instrument D7 to record intensity maps of reciprocal space to address our questions about the spin correlations in the frustrated heavy-fermion compound CePdAl.
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STOCKERT Oliver; FRITSCH Veronika; HANNASKE Ariane; WILDES Andrew and WOITSCHACH Sarah. (2012). Short-range magnetic correlations in geometrically frustrated CePdAl. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-298
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