Magnetic Properties of CoWN2 Synthesized by Ammonolysis of Nanocrystalline CoWO4 Materials.
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| Title: | Magnetic Properties of CoWN |
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| Authors: | Mishra, Pragnya Paramita1 (AUTHOR), Patil, Anagha B.1 (AUTHOR), Panda, Rabi N.1 (AUTHOR) rnp@goa.bits-pilani.ac.in |
| Source: | Journal of Superconductivity & Novel Magnetism. Jul2024, Vol. 37 Issue 5-7, p1189-1197. 9p. |
| Subjects: | Magnetic properties, Ammonolysis, Transition metal nitrides, Chemical synthesis, Magnetic measurements |
| Abstract: | We report a novel chemical methodology for the synthesis of nanocrystalline CoWN2 which is stabilized by the induction effect. The methodology involves the nitridation of sol-gel-derived CoWO4 precursor in nanocrystalline form using gaseous NH3(g). We could obtain CoWN2 as a nitrided product at both 700 °C and 750 °C with varied crystallinity. The synthesized materials were characterized using XRD, FESEM, EDS, and magnetic measurements. XRD studies confirm hexagonal CoWN2 phase formation with a minor impurity phase which comprises of metallic Co. We have noted the values of lattice constants of CoWN2 materials, i.e., a = 2.876(7) Å, b = 2.876(6) Å, c = 15.372(48) Å, and a = 2.872(3) Å, b = 2.872(2) Å, and c = 15.381(21) for the products synthesized at 700 °C and synthesized at 750 °C, respectively. The crystallite sizes are calculated as 11 ± 0.5 nm for CoWN2 nanomaterials synthesized at 700 °C whereas 16 ± 0.5 nm for CoWN2 nanomaterials synthesized at 750 °C. FESEM micrograph studies of CoWN2 nanomaterials show nearly spherical particles. The average particle sizes obtained from FESEM images are 90 ± 5 nm for the nanomaterials obtained at 700 °C and 45 ± 2 nm for those obtained at 750 °C. Room temperature magnetic parameters, i.e., Ms and Hc for CoWN2 materials synthesized at 700 °C are found to be 1.49 emu/g and 389 Oe, respectively, whereas for CoWN2 materials (synthesized at 750 °C), the values marginally reduce to 0.06 emu/g and 375 Oe, respectively. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | We report a novel chemical methodology for the synthesis of nanocrystalline CoWN2 which is stabilized by the induction effect. The methodology involves the nitridation of sol-gel-derived CoWO4 precursor in nanocrystalline form using gaseous NH3(g). We could obtain CoWN2 as a nitrided product at both 700 °C and 750 °C with varied crystallinity. The synthesized materials were characterized using XRD, FESEM, EDS, and magnetic measurements. XRD studies confirm hexagonal CoWN2 phase formation with a minor impurity phase which comprises of metallic Co. We have noted the values of lattice constants of CoWN2 materials, i.e., a = 2.876(7) Å, b = 2.876(6) Å, c = 15.372(48) Å, and a = 2.872(3) Å, b = 2.872(2) Å, and c = 15.381(21) for the products synthesized at 700 °C and synthesized at 750 °C, respectively. The crystallite sizes are calculated as 11 ± 0.5 nm for CoWN2 nanomaterials synthesized at 700 °C whereas 16 ± 0.5 nm for CoWN2 nanomaterials synthesized at 750 °C. FESEM micrograph studies of CoWN2 nanomaterials show nearly spherical particles. The average particle sizes obtained from FESEM images are 90 ± 5 nm for the nanomaterials obtained at 700 °C and 45 ± 2 nm for those obtained at 750 °C. Room temperature magnetic parameters, i.e., Ms and Hc for CoWN2 materials synthesized at 700 °C are found to be 1.49 emu/g and 389 Oe, respectively, whereas for CoWN2 materials (synthesized at 750 °C), the values marginally reduce to 0.06 emu/g and 375 Oe, respectively. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 15571939 |
| DOI: | 10.1007/s10948-024-06753-2 |
