Gd3+电子自旋共振探测CeIn3-xSnx中4f电子的定域巡游行为
Probing the localized to itinerant behavior of the 4f electron in CeIn3-xSnx by Gd3+ electron spin resonance
摘要：
CeIn 3-xSnx立方重费米子系统在T_N = 10 K时出现反铁磁转变，当x = 0时，当Sn的临界浓度为xc~0.65时，反铁磁转变持续下降到0 K.在T_N-> 0附近，由于反铁磁临界涨落，系统表现出非费米液体行为。对于高Sn含量，x> 2.2，存在中间价效应。在这项工作中，我们表明，Gd 3+掺杂的电子自旋共振（ESR）探针的Ce 4f电子的字符的变化，作为Sn取代的函数。Gd~（3+）的ESR结果表明，Ce~（4f）的自旋行为从局域态向巡游态转变。在量子临界点附近，在磁相图的反铁磁侧，局域化和巡回行为共存。
英文摘要：
The CeIn3-xSnx cubic heavy fermion system presents an antiferromagnetic transition at T_N = 10 K, for x = 0, that decreases continuously down to 0 K upon Sn substitution at a critical concentration of x_c ~ 0.65. In the vicinity of T_N -> 0 the system shows non-Fermi liquid behavior due to antiferromagnetic critical fluctuations. For a high Sn content, x > 2.2, intermediate valence effects are present. In this work we show that Gd3+-doped electron spin resonance (ESR) probes a change in the character of the Ce 4f electron, as a function of Sn substitution. The Gd3+ ESR results indicate a transition of the Ce 4f spin behavior from localized to itinerant. Near the quantum critical point, on the antiferromagnetic side of the magnetic phase diagram, both localized and itinerant behaviors coexist.
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