| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1616171 | Journal of Alloys and Compounds | 2012 | 9 Pages |
X-ray powder diffraction and bulk magnetization measurements were used to study structural and magnetic properties of hydrides NdMn2Hx (2.0 ≤ x ≤ 4.0). The X-ray investigations performed in the temperature range 70–385 K have revealed many structural transformations at low temperatures. In particular, a transformation from the hexagonal to the monoclinic phase and spinodal decompositions were observed. The magnetic behavior of the hydrides is correlated with the structural transitions. A tentative structural diagram is presented. The obtained results are compared with the properties of other cubic and hexagonal RMn2Hx hydrides.
► Full structural phase diagram is presented for the NdMn2Hx (2.0 ≤ x ≤ 4.0) hydrides in the temperature range of 70–385 K. ► For samples x = 2.0, 2.5, and 4.0 a splitting into two phases with different hydrogen concentrations are observed. ► Only for samples with x = 3.0 and 3.5 no spinodal decompositions are detected. ► The effects of hydrogen absorption on structural properties are shown to be reflected in magnetic behavior. ► A huge jump of magnetic ordering temperatures from ∼104 K for host NdMn2 to above 200 K for its hydrides is observed or anticipated.
