تقرير
Schottky anomaly and short-range antiferromagnetic correlations in filled skutterudites Pr$_{1-x}$Eu$_x$Pt$_4$Ge$_{12}$
| العنوان: | Schottky anomaly and short-range antiferromagnetic correlations in filled skutterudites Pr$_{1-x}$Eu$_x$Pt$_4$Ge$_{12}$ |
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| المؤلفون: | Adhikari, R. B., Shen, P., Kunwar, D. L., Jeon, I., Maple, M. B., Dzero, M., Almasan, C. C. |
| المصدر: | Phys. Rev. B 100, 174509 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Superconductivity |
| الوصف: | By performing a series of thermodynamic measurements in an applied magnetic field $H_{\textrm{ext}}$, we investigated the effects of Eu substitution on the Pr sites in filled skutterudite compound Pr$_{1-x}$Eu$_x$Pt$_4$Ge$_{12}$ ($ 0 \leq x \leq 1$). A heat capacity Schottky anomaly is present over the whole doping range. For the samples with $x > 0.5$, these Schottky anomaly peaks shift to lower temperature with increasing $H_{\textrm{ext}}$. We argue that this behavior reflects the antiferromagnetic (AFM) ordering of the Eu moments, as the AFM transition is suppressed by $H_{\textrm{ext}}$. The Schottky peaks in the samples with $x \leq 0.5$ shift to higher temperatures with increasing magnetic field, signaling the presence of an internal magnetic field due to short-range AFM correlations induced by magnetic moments of neighboring Eu sites. In low $H_{\textrm{ext}}$, the Schottky gaps show a non-linear relationship with $H_{\textrm{ext}}$ as the magnetic moments become weakly magnetized. In high $H_{\textrm{ext}}$, the magnetic moments of Eu sites become completely aligned with $H_{\textrm{ext}}$. Thus, increasing $H_{\textrm{ext}}$ does not further increase the magnetization, hence the Schottky gaps increase linearly with $H_{\textrm{ext}}$ Comment: 5 pages 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.100.174509 |
| URL الوصول: | http://arxiv.org/abs/1902.05468 |
| رقم الأكسشن: | edsarx.1902.05468 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.100.174509 |
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