Mössbauer Observation of the Quantum Levels of Fe 3 + Ions Doped in 1D Ising Ferromagnet C a 3 C o 2 O 6
Mössbauer Observation of the Quantum Levels of Fe 3 + Ions Doped in 1D Ising Ferromagnet C a 3 C o 2 O 6
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DOI：
10.1103/physrevlett.79.3258
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发表时间：
1997-10
影响因子：
8.6
通讯作者：
H. Kageyama;S. Kawasaki;K. Mibu;M. Takano;K. Yoshimura;K. Kosuge
中科院分区：
文献类型：
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作者：
H. Kageyama;S. Kawasaki;K. Mibu;M. Takano;K. Yoshimura;K. Kosuge
我们测量了一维伊辛铁磁体Ca3CO2 O6中掺杂5 7 Fe3+(S=5/2)离子的穆斯堡尔效应。在T≤2 0K的磁致密系统中首次观测到与交换极化的Fe电子自旋mz=±5/2，±3/2，±1/2相对应的超精细场光谱，表明Fe3+位的磁弛豫较慢。关键在于宿主(Ising)自旋和杂质(Heisenberg)自旋的磁性差别很大，使得杂质自旋在宿主一维Ising自旋系统中极为孤立。
We have measured the Mössbauer effect of 57 Fe 3+(S= 5/2) ions doped in a 1D Ising ferromagnet C a 3 C o 2 O 6. The spectra with hyperfine fields corresponding to the exchange polarized Fe electron spins with m z=±5/2,±3/2,±1/2 are first observed in the magnetically dense system for T≤ 20 K, suggesting slow magnetic relaxation at the Fe 3+ sites. The key lies in the large difference between magnetic characters of the host (Ising) and impurity (Heisenberg) spins, making the impurity spins extremely isolated in the host 1D Ising spin system.