T. Hayashi et al., Magnetic properties and CMR effect in layer type manganite LaSr2Mn2O7 under high magnetic fields, J PHYS-COND, 10(49), 1998, pp. 11525-11529
Magnetoresistance and magnetization were measured for single crystals of La
Sr2Mn2O7 utilizing a nondestructive long-pulse magnet over the whole temper
ature region below room temperature. Application of a magnetic field gradua
lly changes an antiferromagnetic insulating state into a forced ferromagnet
ic metallic state. It was found that the change of resistivity is irreversi
ble, but no ferromagnetic domain is generated by external magnetic held.