HIGH-TEMPERATURE STRUCTURAL BEHAVIOR OF SRRUO3

The unusual metal SrRuO3 is perhaps the only known 4d transition-metal -based ferromagnet (T-c = 162 K) with a sizable moment. To complement low-T polarized neutron diffraction measurements of the magnetization density, high-cr neutron diffraction measurements are reported here. T wo structural phase transitions are observed. Between 10 and 800 K, Sr RuO3 is orthorhombic and at 800 K it appears to be tetragonal until 97 5 K, where it becomes cubic. The temperature variation of the lattice parameters is reported along with a structural description of the tetr agonal phase. Published by Elsevier Science B.V.