Investigation of the crystal structure and magnetic properties of Nd_(3-x)GdxCo_(11)B_4 borides

作     者：Seluk Kervan Nazmiye Kervan Ayse zdemir Hseyin Szeri 

作者机构：Nevsehir UniversityFaculty of Arts and SciencesPhysics Department TUBTAK-UMENational Metrology Institute 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2011年第29卷第5期

页      面：466-470页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

主　　题：intermetallics magnetically ordered materials magnetic measurements rare earths 

摘      要：Polycrystalline samples of pseudo-ternary intermetallic Nd3–xGdxCo11B4 （x=0,1,2,3） borides prepared by standard arc-melting were characterized by X-ray powder diffraction （XRPD）,magnetization and differential scanning calorimetry （DSC） measurements. The X-ray diffraction patterns indicated the hexagonal Ce3Co11B4-type structure with P6/mmm space group for each composition. The substitution of Gd for Nd led to a decrease of the unit-cell parameters a and the unit-cell volume V,while the unit-cell parameter c increased linearly. Magnetic measurements indicated that all samples were ordered magnetically below the Curie temperature. The Curie temperatures increased as Nd was substituted by Gd. The saturation magnetization at 4 K decreased upon the Gd substitution up to x=1,and then increased.