&mgr;(+) knight shift measurements in U0.965Th0.035Be13 single crystals
Muon spin rotation ( &mgr;SR) measurements of the temperature dependence of the &mgr;(+) Knight shift in single crystals of U0. 965Th0.035Be13 have been used to study the static spin susceptibility chi(s) below the transition temperatures T(c1) and T(c2). While an abrupt reduction of chi(s) with decreasing temperature is observed below T(c1), chi(s) does not change below T(c2) and remains at a value below the normal-state susceptibility chi(n). In the normal state we find an anomalous anisotropic temperature dependence of the transferred hyperfine coupling between the &mgr;(+) spin and the U 5f electrons.
Sonier
JE
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Heffner
RH
MacLaughlin
DE
Nieuwenhuys
GJ
Bernal
O
Movshovich
R
Pagliuso
PG
Cooley
J
Smith
JL
Thompson
JD