Structural, optical, and magnetic behavior and the nucleation of a Griffiths-like phase in (Ca,V)-doped ZnO nanoparticles
Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn Ca V O, called hereinafter ZCVO) were synthesized a modified sol-gel method. The hexagonal wurtzite symmetry of the ZnO phase nanostructure, belonging to the 6 space group, has been confirmed through X-ray diffraction examinations using Rietveld ref...
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| Veröffentlicht in: | Dalton transactions : an international journal of inorganic chemistry Jg. 54; H. 18; S. 7400 |
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| Hauptverfasser: | , , , , , , , |
| Format: | Journal Article |
| Sprache: | Englisch |
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England
06.05.2025
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| ISSN: | 1477-9234, 1477-9234 |
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| Abstract | Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn
Ca
V
O, called hereinafter ZCVO) were synthesized
a modified sol-gel method. The hexagonal wurtzite symmetry of the ZnO phase nanostructure, belonging to the
6
space group, has been confirmed through X-ray diffraction examinations using Rietveld refinement. No segregated secondary phases or Ca or/and V-rich clusters were detected. The TEM images clearly show the presence of nanoparticles exhibiting a diverse range of spherical shapes. The effect of co-doping on the optical band gap and crystalline quality was also investigated
photoluminescence (PL), UV-vis, and Raman spectrometers. The
-
curve suggests a tenability of magnetic coupling which was discussed within the context of three competing magnetic phases using the 3D spin wave model and Curie-Weiss law. The lack of saturation of the
-
loop at 10 K suggests the presence of both paramagnetic (PM) and ferromagnetic (FM) phases in ZCVO NPs. The bound magnetic polaron (BMP) model provides a plausible explanation for the observed magnetic phase transition. Moreover, a Griffiths-like phase was observed for the first time, to our knowledge, in co-doped ZnO nanoparticles. This novelty may stem from the interplay between the antiferromagnetic (AFM) and FM interactions of the Ca and V ions, which are acquired by oxygen deficiency. |
|---|---|
| AbstractList | Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn0.93Ca0.04V0.03O, called hereinafter ZCVO) were synthesized via a modified sol-gel method. The hexagonal wurtzite symmetry of the ZnO phase nanostructure, belonging to the P63mc space group, has been confirmed through X-ray diffraction examinations using Rietveld refinement. No segregated secondary phases or Ca or/and V-rich clusters were detected. The TEM images clearly show the presence of nanoparticles exhibiting a diverse range of spherical shapes. The effect of co-doping on the optical band gap and crystalline quality was also investigated via photoluminescence (PL), UV-vis, and Raman spectrometers. The M-T curve suggests a tenability of magnetic coupling which was discussed within the context of three competing magnetic phases using the 3D spin wave model and Curie-Weiss law. The lack of saturation of the M-H loop at 10 K suggests the presence of both paramagnetic (PM) and ferromagnetic (FM) phases in ZCVO NPs. The bound magnetic polaron (BMP) model provides a plausible explanation for the observed magnetic phase transition. Moreover, a Griffiths-like phase was observed for the first time, to our knowledge, in co-doped ZnO nanoparticles. This novelty may stem from the interplay between the antiferromagnetic (AFM) and FM interactions of the Ca and V ions, which are acquired by oxygen deficiency.Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn0.93Ca0.04V0.03O, called hereinafter ZCVO) were synthesized via a modified sol-gel method. The hexagonal wurtzite symmetry of the ZnO phase nanostructure, belonging to the P63mc space group, has been confirmed through X-ray diffraction examinations using Rietveld refinement. No segregated secondary phases or Ca or/and V-rich clusters were detected. The TEM images clearly show the presence of nanoparticles exhibiting a diverse range of spherical shapes. The effect of co-doping on the optical band gap and crystalline quality was also investigated via photoluminescence (PL), UV-vis, and Raman spectrometers. The M-T curve suggests a tenability of magnetic coupling which was discussed within the context of three competing magnetic phases using the 3D spin wave model and Curie-Weiss law. The lack of saturation of the M-H loop at 10 K suggests the presence of both paramagnetic (PM) and ferromagnetic (FM) phases in ZCVO NPs. The bound magnetic polaron (BMP) model provides a plausible explanation for the observed magnetic phase transition. Moreover, a Griffiths-like phase was observed for the first time, to our knowledge, in co-doped ZnO nanoparticles. This novelty may stem from the interplay between the antiferromagnetic (AFM) and FM interactions of the Ca and V ions, which are acquired by oxygen deficiency. Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn Ca V O, called hereinafter ZCVO) were synthesized a modified sol-gel method. The hexagonal wurtzite symmetry of the ZnO phase nanostructure, belonging to the 6 space group, has been confirmed through X-ray diffraction examinations using Rietveld refinement. No segregated secondary phases or Ca or/and V-rich clusters were detected. The TEM images clearly show the presence of nanoparticles exhibiting a diverse range of spherical shapes. The effect of co-doping on the optical band gap and crystalline quality was also investigated photoluminescence (PL), UV-vis, and Raman spectrometers. The - curve suggests a tenability of magnetic coupling which was discussed within the context of three competing magnetic phases using the 3D spin wave model and Curie-Weiss law. The lack of saturation of the - loop at 10 K suggests the presence of both paramagnetic (PM) and ferromagnetic (FM) phases in ZCVO NPs. The bound magnetic polaron (BMP) model provides a plausible explanation for the observed magnetic phase transition. Moreover, a Griffiths-like phase was observed for the first time, to our knowledge, in co-doped ZnO nanoparticles. This novelty may stem from the interplay between the antiferromagnetic (AFM) and FM interactions of the Ca and V ions, which are acquired by oxygen deficiency. |
| Author | El Mir, L Bessadok, M N Alshammari, M Ihzaz, N Vázquez-Vázquez, C Ananias, D Lemine, O M Mrabet, S |
| Author_xml | – sequence: 1 givenname: S surname: Mrabet fullname: Mrabet, S email: nejib.ihzaz@issatgb.rnu.tn organization: Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in Gabes, Gabes University, 6072 Gabes, Tunisia. nejib.ihzaz@issatgb.rnu.tn – sequence: 2 givenname: N orcidid: 0000-0003-4239-0214 surname: Ihzaz fullname: Ihzaz, N email: nejib.ihzaz@issatgb.rnu.tn organization: Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in Gabes, Gabes University, 6072 Gabes, Tunisia. nejib.ihzaz@issatgb.rnu.tn – sequence: 3 givenname: M N surname: Bessadok fullname: Bessadok, M N email: nejib.ihzaz@issatgb.rnu.tn organization: Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in Gabes, Gabes University, 6072 Gabes, Tunisia. nejib.ihzaz@issatgb.rnu.tn – sequence: 4 givenname: C surname: Vázquez-Vázquez fullname: Vázquez-Vázquez, C organization: Laboratory of Magnetism and Nanotechnology (NANOMAG), Department of Physical Chemistry, Institute of Materials (iMATUS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain – sequence: 5 givenname: M surname: Alshammari fullname: Alshammari, M organization: The National Center for Laser and Optoelectronics, KACST, Riyadh, Saudi Arabia – sequence: 6 givenname: O M surname: Lemine fullname: Lemine, O M organization: Department of Physics, College of Sciences, Imam Mohammad Ibn Saud Islamic University (IMISU), Riyadh 11623, Saudi Arabia – sequence: 7 givenname: D surname: Ananias fullname: Ananias, D organization: Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal – sequence: 8 givenname: L surname: El Mir fullname: El Mir, L email: nejib.ihzaz@issatgb.rnu.tn organization: Laboratory of Physics of Materials and Nanomaterials Applied at Environment (LaPhyMNE), Faculty of Sciences in Gabes, Gabes University, 6072 Gabes, Tunisia. nejib.ihzaz@issatgb.rnu.tn |
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| Snippet | Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn
Ca
V
O, called hereinafter ZCVO) were synthesized
a modified sol-gel method. The hexagonal wurtzite symmetry... Single-phase (Ca,V) co-doped ZnO nanoparticles (Zn0.93Ca0.04V0.03O, called hereinafter ZCVO) were synthesized via a modified sol-gel method. The hexagonal... |
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| Title | Structural, optical, and magnetic behavior and the nucleation of a Griffiths-like phase in (Ca,V)-doped ZnO nanoparticles |
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