Abstract
The effect of electron doping by the substitution of Rh for Ru on unconventional magnetic order in CeRu2Al10 was
investigated via neutron powder diffraction. In Ce(Ru1¹xRhx)2Al10 with x = 0.05, 0.12, and 0.2, reorientation of the
ordered moment from the c-axis as in pure CeRu2Al10 to the a-axis takes place in all samples, while the ordering vector
q ¼ ð0; 1; 0Þ remains unchanged within this concentration range. The moment reorientation is accompanied by an
increase in its size by a factor of ³2.4, from ® = 0.43®B at x = 0 to ® = 1.06, 1.04, and 1.02®B for x = 0.05, 0.12, and
0.2, respectively. The continuous decrease in the Néel temperature T0(TN), despite an abrupt increase in ®, underlines the
strong anisotropy in the exchange interaction in CeRu2Al10 and the fact that this anisotropy is easily suppressed by
electron doping.
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