- 作者: 張仁昌;余健治
- 作者服務機構: Institute of Physics National Taiwan Normal University Taipei, Taiwan Republic of China
- 中文摘要: 本文討論在羥基?礬單晶中鉻離子的電子順磁共振現象,羥基銨鋁礬與羥基銨鉻礬可用任意比例長出混合單品,本文討論鉻離子濃度較低時的順磁共振結果。室?的共振譜圖顯示出?度頗大的譜線,且譜線的數目較一般的礬類品體?少。實驗數據的解釋符合於?晶室中有四個化學上相類似,但晶體場對稱軸不同的鉻離子之模型。
- 英文摘要: The electron paramagnetic resonance of Cr3+ in single crystals of NH30HA1(S04)2* 12 h2o can be analyzed in terms of an effective spin Hamiltonian of trigonal symmetry. There are four chemically equivalent but magnetically Tion-equivalent Qr3+Sites in each unit cell of the crystal lattice. The trigonal axes of the crystal field coincide with the four <111> directions of the NH30H-alum. The observed resonance lines at the ambient temperature are inhomogeneously broadened such that the intensity ratio of the Δm=1 transitions deviates considerably from the theoretical value of 3:4:3.
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