New magnetic phase in rb3c60 fullerene in normal state observed in torque experiments

Details New magnetic phase in rb3c60 fullerene in normal state observed in torque experiments New magnetic phase in rb3c60 fullerene in normal state observed in torque experiments

2010-06-30

arxiv.org/abs/1006.5817v1

Physics

Condensed Matter

Superconductivity

Scientific paper

For the first time, magnetic properties of fullerides have been studied using a torque technique. Rb3C60 single crystal has been investigated in these experiments. It was shown that this method is sensitive to the structural phase transition from s.c. to f.c.c. structure. A rearrangement of magnetic system in this material was observed at temperature T ~ 200 - 250 K. Our results clearly show, that this effect is a crossover to an ordered magnetic phase related to interaction of magnetic dipoles and is related to the distorted T' site. The effect is discussed in terms of cooperative Jahn-Teller effect.

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