Optical absorption and electron paramagnetic resonance of Cu2+ ions in a low dimensional CaCu(HCOO)4 single crystal

✍ Scribed by N. Narsimlu; D. Sreenivasu; S. Rahman; K. SivaKumar; G.S. Sastry

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 223 KB
• Volume: 39
• Category: Article
• ISSN: 0921-5107
• DOI: 10.1016/0921-5107(95)01423-3

✦ Synopsis

Optical absorption and electron paramagnetic response (EPR) of Cu2+ ions in a CaCu(HCOO), single crystal have been studied. Analysis of EPR spectra using crystal field theory indicates that Cu2+ ions are in tetragonally distorted (elongated) octahedral sites. The optical absorption in the W-visible region are characterized by a charge transfer band and cubic field splitting of the 3d energy level of the CU'+ ion, but in the near-IR the absorptions at 4225, 4310, 5000, 5714 and 6622 cm-' are attributed to the transitions between the admixed quantized energy levels of copper and oxygen orbitals.