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La2 CuO4的结构中因存在键角为 180°的…Cu—O—Cu—O—Cu…链而表现出反铁磁性 .Zn2 + 或Mg2 + 取代Cu2 + 后就破坏了这种长程有序 ,使Cu2 + 的有效磁矩升高 ,并且在 77～ 30 0K温区内观察不到N啨ｅｌ态 .La2 Cu1 xNixO4没有电子自旋共振(ESR)响应 ,也观察不到其N啨ｅｌ态 .La2 Cu1 xMxO4(M =Zn2 + ,Mg2 + )有ESR响应 ,这种响应很可能是由拉长的CuO6 八面体产生的 .采用常规的物理方法如X 射线粉末衍射 (XRD)和电子自旋共振等对样品进行了表征
The structure of La2 CuO4 shows anti-ferromagnetism due to the presence of ... Cu-O-Cu-O-Cu ... chains with a 180 ° bond angle.The substitution of Cu2 + with Zn2 + or Mg2 + The effective magnetic moment of Cu2 + is increased, and the N 啨 el state is not observed in the temperature range of 77-30 K. The La2Cu1xNixO4 has no electron spin resonance (ESR) response and no N 啨 el state is observed. The ESR response of La2Cu1xMxO4 (M = Zn2 +, Mg2 +) is likely to be caused by elongated CuO6 octahedra using conventional physical methods such as X-ray powder diffraction (XRD) and electron spin resonance The samples were characterized