Thermal Hysteresis of Photoinduced Magnetic Effect in Yttrium Iron Garnet K. Hisatake, I. Matsubara, K. Maeda, H. Yasuoka, H. Mazaki, H. Shinohara and K. Uematsu J. Phys. IV France, 07 C1 (1997) C1-293-C1-294 DOI: 10.1051/jp4:19971116