Electron spin resonance of the itinerant magnets ZrZn2 and Nb1−yFe2+y: A comparison
Electron spin resonance of the itinerant magnets ZrZn2 and Nb1−yFe2+y: A comparison
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流动磁体 ZrZn2 和 Nb1−yFe2+y 的电子自旋共振：比较
DOI：
10.1088/1742-6596/200/1/012035
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
F. Steglich
中科院分区：
文献类型：
--
作者：
T. Förster;J. Sichelschmidt;D. Grüner;M. Brando;N. Kimura;F. Steglich
两种Laves相化合物ZrZn_2和NbFe_2属于低温巡回磁体的小类。虽然ZrZn 2显示出具有小有序矩的铁磁（FM）转变，但Nb 1 − yFe 2 +y表现出磁有序基态，据信其具有自旋密度波类型，|y| < 0.015，y的FM ≥ 0.02。此外，对数费米液体击穿的特征表明在富铌一侧存在一个量子临界点，即y =-0.015。在这两个系统中，大大增强的斯通纳因子表明FM相关性的存在，这在一般情况下，支持传导电子自旋共振（ESR）的可观测性。我们提出了我们的ESR测量结果的高品质ZrZn 2单晶和多晶样品的Nb 1 − yFe 2 +y。这两种化合物的ESR数据进行分析的传导ESR受到强烈的交换增强效应。
The two Laves phase compounds ZrZn2 and NbFe2 belong to the small group of low temperature itinerant magnets. While ZrZn2 shows a ferromagnetic (FM) transition with a small ordered moment, Nb1−yFe2+y exhibits a magnetically ordered ground state which is believed to be of spin-density-wave type for |y| < 0.015 and FM for y ≥ 0.02. Furthermore, signatures of a logarithmic Fermi-liquid breakdown suggest the existence of a quantum critical point on the Nb-rich side at y ≈ −0.015. In both systems a largely enhanced Stoner factor indicates the presence of FM correlations, which, in general, support the observability of a conduction electron spin resonance (ESR). We present our results of ESR measurements on high quality ZrZn2 single crystals and on polycrystalline samples of Nb1−yFe2+y. The ESR data of both compounds is analysed in terms of a conduction ESR being subject to strong exchange enhancement effects.
影响因子：
8.6
作者：
Kimura, N;Endo, M;Lonzarich, GG
通讯作者：
Lonzarich, GG