NdFeO 3 single crystals have been grown by optical floating-zone technique using Nd 2 O 3 and Fe 2 O 3 as the source by solid-state reaction method. The crystalline structure of NdFeO 3 belongs to orthorhombic symmetry and the presence of a distorted perovskite structure was confirmed by powder X-ray diffraction (XRD) analysis. From the XRD results, it is visualized that the lattice expansion has been observed in the unit cell parameters which may appear due to interstitial defects in the NdFeO 3 matrix. The deficiency of oxygen atoms and the presence of excess Fe ions in NdFeO 3 have been confirmed with EDX spectra. The spin-reorientation region ( T = 120 K) exhibits lower coercive field and the hysteresis loops depict enhanced magnetization ( M s and M r ) values of NdFeO 3 single crystal. Presence of compensation temperature point at T comp = 7.5 K denotes the anti-parallel alignment of rare-earth ions with Fe magnetic moments. At high temperatures, Fe 3+ magnetic moments show strong antiferromagnetic interactions ensuing in Neel temperature ( T N ) at 690 K.

中文翻译：

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光浮区技术生长的NdFeO3单晶结构和磁性能研究

NdFeO 3 单晶已通过固相反应法以Nd 2 O 3 和Fe 2 O 3 为源，通过光浮区技术生长。NdFeO 3 的晶体结构属于正交对称，并且通过粉末 X 射线衍射 (XRD) 分析证实存在扭曲的钙钛矿结构。从XRD结果可以看出，在晶胞参数中观察到晶格膨胀，这可能是由于NdFeO 3 基体中的间隙缺陷而出现的。EDX 光谱证实了 NdFeO 3 中氧原子的缺乏和过量的 Fe 离子的存在。自旋重定向区域 (T = 120 K) 表现出较低的矫顽场，磁滞回线描绘了 NdFeO 3 单晶增强的磁化强度（ M s 和 M r ）值。在 T comp = 7 时存在补偿温度点。5 K 表示稀土离子与 Fe 磁矩的反平行排列。在高温下，Fe 3+ 磁矩在 690 K 的尼尔温度 (TN) 下显示出强烈的反铁磁相互作用。