Effect of spin fluctuations in the thermodynamic and transport properties of itinerant ferromagnet CoS2
Effect of spin fluctuations in the thermodynamic and transport properties of itinerant ferromagnet CoS2
复制标题
自旋波动对巡回铁磁体 CoS2 热力学和输运性质的影响
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
J. Rivas
中科院分区：
文献类型：
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作者：
M. Otero;F. Rivadulla;Garcı́a;A. Piñeiro;V. Pardo;D. Baldomir;J. Rivas
通过对多晶和单晶CoS2在压力下的比热、电阻率和磁化率的详细研究，我们证明了该系统的热力学和输运性质受自旋密度涨落的影响。我们给出了该系统三临界点的正确（P，T）坐标，并讨论了该系统一级磁相变的起源。我们的研究结果突出了具有干净的单晶体的重要性，以提取有关巡游弱铁磁体的内在性质的明确结论。
Through a detailed study of the specific heat, resistivity and susceptibility under pressure in polycrystalline and single-crystal CoS2, we demonstrate that the thermodynamic and transport properties of this system are governed by spin density fluctuations. We give the correct (P, T) coordinates of its tricritical point, and discuss the origin of the first-order magnetic phase transition in this system. Our results highlight the importance of having clean single crystals in order to extract definitive conclusions about the intrinsic properties of itinerant weak ferromagnets.