Wave-vector- and magnetic-field-dependent spin fluctuations in the heavy-fermion system CeCu6.

Wave-vector- and magnetic-field-dependent spin fluctuations in the heavy-fermion system CeCu6.
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重费米子系统 CeCu6 中波矢和磁场相关的自旋涨落。

DOI:
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发表时间:
1986
影响因子:
8.6
通讯作者:
T. Komatsubara
T. Komatsubara
中科院分区:
物理与天体物理1区
文献类型:
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作者:
G. Aeppli;H. Yoshizawa;Y. Endoh;Ernst Bucher;J. Hufnagl;Y. Onuki;T. Komatsubara

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我们在 0 至 6.4 T 的外加磁场中对 CeCu/sub 6/ 单晶进行了中子散射测量。观察到的动量相关磁散射意味着短程反铁磁相关性的存在。虽然它不会引起共振,但该场在 T-斜体 = 0.4 K 处显着展宽了光谱。结合了单杂质近藤性质和反铁磁 Ruderman-Kittel-Kasuya-Yosida 相互作用的有效哈密顿量描述了我们的数据。
We have performed neutron-scattering measurements on a single crystal of CeCu/sub 6/ in applied magnetic fields from 0 to 6.4 T. The observed momentum-dependent magnetic scattering implies the existence of short-range antiferromagnetic correlations. While it induces no resonances, the field broadens the spectra considerably at T-italic = 0.4 K. An effective Hamiltonian which incorporates both single-impurity Kondo properties and antiferromagnetic Ruderman-Kittel-Kasuya-Yosida interactions describes our data.