The crystal field strength parameter 10Dq can be defined as [26]:
10Dq ¼ 5Ze2r4 = 3a5
where 10Dq is the crystal field at octahedral symmetry, Z is the charge of the ligand, e is the charge of an electron, r is the radius of the d
wavefunction and a is the bond length. From the XRD results, we conclude that the poor crystallization in the 0-Pa film sample may be due to the formation of oxygen vacancies. The presence of oxygen vacancies leads to a distortion of the symmetry of the Oh site, and weakens the interaction between Cr3+ located in the center of Oh site and its surrounding O2−, indicating increasing ionicity.
The crystal field strength parameter 10Dq can be defined as [26]:10Dq ¼ 5Ze2r4 = 3a5where 10Dq is the crystal field at octahedral symmetry, Z is the charge of the ligand, e is the charge of an electron, r is the radius of the dwavefunction and a is the bond length. From the XRD results, we conclude that the poor crystallization in the 0-Pa film sample may be due to the formation of oxygen vacancies. The presence of oxygen vacancies leads to a distortion of the symmetry of the Oh site, and weakens the interaction between Cr3+ located in the center of Oh site and its surrounding O2−, indicating increasing ionicity.
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