Large plate-like single crystals of La5Mo4O16 were prepared by electrolyzing molten mixtures of La2O3, MoO3 and Na2MoO4. The temperature dependence of electrical resistivity in the ab plane and parallel to the c-axis of the single crystal shows semiconducting behavior in the temperature range 180-300 K and a sharp upturn in the resistivity below ∼180 K. The temperature variation of the susceptibility in the temperature range 200-300 K follows Curie-Weiss behavior with an observed moment ∼1.66 B.M. corresponding to one localized electron per formula unit. The magnetization study on a batch of randomly oriented single crystals showed a sharp decrease in the susceptibility at ∼180 K indicative of a long-range antiferromagnetic order. Directional magnetization studies on La5Mo4O16 indicated that the magnetic ordering is confined to the ab plane. The anomalous electrical and magnetic properties are discussed in terms of the unique structure of La5Mo4O16.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering