Successive magnetic transitions of the kagome plane and field-driven chirality in single-crystal BaMn2.49Ru3.51O11
نویسندگان
چکیده
The magnetization of single-crystal BaMn2.49Ru3.51O11 exhibits anomalies at temperatures T1=183 K, T2 =171 K, and T3=128 K, which signal complex magnetic order induced by competing ferroand antiferromagnetic correlations, and magnetic frustration within the kagome hexagonal ab plane. The T2 and T3 anomalies and unconventional transverse magnetoresistance are observed only for magnetic field H applied in the kagome plane. We conclude a topological Hall effect is generated by nonzero scalar chirality of spins canted out of the kagome plane but is suppressed in a collinear structure induced by only modest in-plane fields.
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