کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1530779 | 1511998 | 2009 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Magnetic and thermal properties of perovskite YFeO3 single crystals Magnetic and thermal properties of perovskite YFeO3 single crystals](/preview/png/1530779.png)
In this work, we reported the magnetic and thermal properties of perovskite YFeO3 crystal grown by the floating zone method. YFeO3 crystal is a canted antiferromagnet with a weak ferromagnetic behavior. The magnetization varied nonlinearly from 0.204 emu/g to 0.173 emu/g at the temperature range of 2–300 K. Its Néel temperature is around 644.5 K. The specific heat is about 0.56 J/(g K) at room temperature and reaches the maximum value of 0.77 J/(g K) at 644.5 K where the antiferromagnetic–paramagnetic transition occurs. Both the lattice and magnetic contributions to the heat capacity have been calculated. Thermal diffusivity and the thermal conductivity are as large as 3.53 mm2/s and 11.27 W/(m K) at 298 K, respectively. Both of them show anomalies around the magnetic phase transition point. The average thermal expansion coefficients are −1.72 × 10−6 K−1 and 2.28 × 10−6 K−1 before and after Néel temperature, respectively. The high Néel temperature, high thermal conductivity and small expansion coefficient indicate that YFeO3 crystal is a promising candidate for laser-induced or optical device applications in broad temperature range and high power system.
Journal: Materials Science and Engineering: B - Volume 157, Issues 1–3, 15 February 2009, Pages 77–80