Phase transition with suppression of magnetism in BiFeO3 at high pressure
Phase transition with suppression of magnetism in BiFeO3 at high pressure
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DOI：
10.1134/1.2121819
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发表时间：
2005-08
期刊：
影响因子：
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通讯作者：
A. Gavriliuk;V. Struzhkin;I. Lyubutin;Michael Y. Hu;H. Mao
中科院分区：
文献类型：
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作者：
A. Gavriliuk;V. Struzhkin;I. Lyubutin;Michael Y. Hu;H. Mao
用同步辐射核前向散射方法研究了Bi_（57）FeO_3粉末样品在高压下的磁性。用金刚石对顶砧装置在室温和高达61.4GPa的高压下记录了~（57）Fe核的NFS谱。在0 <P< 47 GPa压力区间内，57 Fe核磁超精细场HFe先增大，在30 GPa时达到52.5T，然后略有减小，在P = 47 GPa时为49.6T。随着压力的进一步增加，磁场Hf Fe突然下降到零，证明从反铁磁态过渡到非铁磁态（磁塌缩）。在压力区间47 <P<61.4GPa，HFe值保持为零。在减压过程中，磁场HFe恢复到低压值。
The magnetic behavior of a Bi57FeO3powdered sample was studied at high pressures by the method of nuclear forward scattering (NFS) of synchrotron radiation. The NFS spectra from57Fe nuclei were recorded at room temperature under high pressures up to 61.4 GPa, which were created in a diamond anvil cell. In the pressure interval 0 <P< 47 GPa, the magnetic hyperfine fieldHFeat the57Fe nuclei increased reaching a value of ∼52.5 T at 30 GPa, and then it slightly decreased to ∼49.6 T atP= 47 GPa. As the pressure was increased further, the fieldHFeabruptly dropped to zero testifying a transition from the antiferromagnetic to a nonmagnetic state (magnetic collapse). In the pressure interval 47 <P< 61.4 GPa, the value ofHFeremained zero. The fieldHFerecovered to the low-pressure values during decompression.