R. Vonhelmolt et al., MAGNETORESISTANCE IN LA2 3CA1/3MNO3+DELTA - DEPENDENCE ON MAGNETIC HISTORY/, Applied physics letters, 67(14), 1995, pp. 2093-2095
We investigated the magnetoresistance of La2/3Ca1/3MnO3+delta magnetic
thin films. Under certain conditions, the magnetoresistance curves sh
ow a remarkable hysteresis and the resistance becomes dependent on the
magnetic history. A relaxation behavior of the resistance has also be
en observed. Hysteresis and relaxation of the resistance are very simi
lar to the phenomena of magnetoviscosity of the magnetic moment in spi
n glasses and the magnetic aftereffect in hard magnets. (C) 1995 Ameri
can Institute of Physics