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Magnetic memory effect in a strong phase competition system La<sub>0.7</sub>Ca<sub>0.3</sub>Mn<sub>0.925</sub>Ti<sub>0.075</sub>O<sub>3</sub>

Nguyen Chi Thuan; Dao Nguyen Hoai Nam; Nguyen Xuan Phuc; Nguyen Thi Yen Mai; Le Van Hong; Nguyen Van Dai; Vu Dinh Lam; Young Pak Lee
Журнал: Journal of Physics: Conference Series
Дата: 2009-09-01

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Аннотация:

A magnetic memory effect was observed by means of zero-field-cooled magnetization measurements in a temperature range below T<sub>C</sub>. The magnitude of magnetic memory effect, determined by the difference between the magnetization curve with a pause of temperature during the cooling process and its reference curve without the pause, showed that it is independent of the number of pauses. The memory effect is supposed to be related to the isolated states with an "infinite" degeneration, which is associated with the presence of magnetic frustration in a system with a strong magnetic phase competition. Besides, a resistance memory effect was concomitantly observed at the same pause temperatures.
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