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首页> 外文期刊>Journal of the Physical Society of Japan >Non-Fermi liquid-like behavior in a heavy lanthanide compound YbFe4P12 with filled skutterudite structure probed by P-31-NMR
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Non-Fermi liquid-like behavior in a heavy lanthanide compound YbFe4P12 with filled skutterudite structure probed by P-31-NMR

机译：通过P-31-NMR探测具有填充方钴矿结构的重镧系元素YbFe4P12中的非费米液体状行为

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摘要

We have carried out P-31-NMR study on a new intermediate-valence compound YbFe4P12 with a filled skutterudite structure which has heavy fermion-like properties below similar to 10 K. The Knight shift has a very small value less than 0.05%, and the linewidth exhibits a monotonic increase without exhibiting any singular behavior down to 0.5 K. The nuclear spin-lattice relaxation rate I IT, T below similar to 50 K strongly depends on both the temperature T and applied magnetic field H and follows the power-law relation 1/T1T = AT(-alpha) over one decade. The power a similar to 0.1 at 7.0 T increases with decreasing H and takes the maximum value of similar or equal to 0.7 at 0.2T, which is close to the value 3/4 expected for the non-Fermi liquid (NFL) state associated with antiferromagnetic spin fluctuations. We suggest that YbFe4P12 is an interesting material in which the NFL-like behavior occurs below a rather high temperature of similar to 10K, and a magnetic field of about 0.2T is sufficient to bring it to its quantum critical point.
机译：我们已经对具有填充方钴矿结构的新型中价化合物YbFe4P12进行了P-31-NMR研究，该结构具有类似于10 K的重像费米子的性质。奈特位移的值非常小，小于0.05％，并且线宽表现出单调增加，直到0.5 K都没有表现出任何奇异行为。核自旋晶格弛豫率I IT，T低于50 K强烈取决于温度T和施加的磁场H并遵循幂律关系1 / T1T =过去十年的AT（-alpha）。功率a在7.0 T时与0.1相似，随H的减小而增大，并且在0.2 T时具有与0.7相似或等于0.7的最大值，接近与非费米液体（NFL）状态相关的预期值3/4。反铁磁自旋涨落。我们建议YbFe4P12是一种有趣的材料，其中类似于NFL的行为在类似于10K的相当高的温度下发生，并且大约0.2T的磁场足以使其达到其量子临界点。

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