The crystal and magnetic structure of LaMn1-xVxO3.

The crystal structure and the magnetic state of polycrystal line samples of the system LaMn1-xVxO3 were determined by X-ray diffraction, neutron diffr action and magnetic measurements from 4.2 to 293 K. The crystal structure w as shown to keep the same symmetry (space group Pnma) after the substitutio n of Mn-ions by V. We observed a change of the magnetic state from a canted antiferromagnetic state with antiferromagnetic moments along the a-axis an d a ferromagnetic along the b-axis, for x < 0.4 to an antiferromagnetic ord ering parallel to the b-axis for x > 0.9. The compounds inside of the trans ition region 0.4 < x < 0.9 show a spin glass-like state. A magnetic phase d iagram of the system LaMn1-xVxO3 was constructed. (C) 2000 Elsevier Science B.V. All rights reserved.