Emergence of Magnetic States in Pr2Fe4–xCoxSb5 (1 < x < 2.5)
| Autor: | Kyle J. Pujol, Katherine A. Benavides, Julia Bykova, Joseph Vade Burnett, Amy V. Walker, Julia Y. Chan, Gregory T. McCandless, Pilanda Watkins-Curry, Jenny K. Hedlund |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Diffraction
Magnetic moment Dopant Chemistry Transition temperature Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Inorganic Chemistry Metal Nuclear magnetic resonance Transition metal Lattice (order) visual_art visual_art.visual_art_medium Physical and Theoretical Chemistry 0210 nano-technology Cobalt |
| Zdroj: | Inorganic Chemistry. 55:1946-1951 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.5b02950 |
| Popis: | Single crystals of Pr2Fe4–xCoxSb5 (1 < x < 2.5) were grown from a Bi flux and characterized by X-ray diffraction. The compounds adopt the La2Fe4Sb5 structure type (I4/mmm). The structure of Pr2Fe4–xCoxSb5 (1 < x < 2.5) contains a network of transition metals forming isosceles triangles. The x ∼ 1 analogue is metallic and exhibits a magnetic transition at T1 ≈ 25 K. The magnetic moment obtained from the Curie–Weiss fit is 11.49(4) μB, which is larger than the spin-only Pr3+ moment. The x ∼ 2 analogue orders magnetically at T1 ≈ 80 and T2 ≈ 45 K. This is the first case of the substitution of Co into the La2Fe4Sb5 structure type, evidenced by the increased concentration of dopant with decreased lattice parameters coupled with a change in the transition temperature with a change in the cobalt concentration. The added complexity in the magnetic behavior of the x ∼ 1 and 2 analogues indicates that the increased concentration of Co invokes an additional magnetic contribution of the transition metal in the sublat... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|