Syntheses, structures, magnetism, and optical properties of gadolinium scandium chalcogenides

• Published in: Journal of solid state chemistry Vol. 182; no. 5; pp. 1075 - 1081
• Main Authors: Jin, Geng Bang, Choi, Eun Sang, Albrecht-Schmitt, Thomas E.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01.05.2009; Elsevier
• Subjects: ANTIFERROMAGNETISM; BISMUTH COMPOUNDS; BISMUTH SELENIDES; BISMUTH SULFIDES; CHALCOGENIDES; CHARGED PARTICLES; Condensed matter: electronic structure, electrical, magnetic, and optical properties; CURIE-WEISS LAW; ENERGY RANGE; EV RANGE; EV RANGE 01-10; Exact sciences and technology; FERROMAGNETISM; GADOLINIUM COMPOUNDS; GADOLINIUM IONS; GADOLINIUM SELENIDES; GADOLINIUM SULFIDES; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; Interlanthanide chalcogenide; IONS; Lanthanide magnetism; MAGNETIC MOMENTS; Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.); MAGNETIC PROPERTIES; Magnetic properties and materials; MAGNETIC SUSCEPTIBILITY; Magnetically ordered materials: other intrinsic properties; MAGNETISM; Mixed-lanthanide chalcogenide; OPTICAL PROPERTIES; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; PHYSICAL PROPERTIES; Physics; RARE EARTH COMPOUNDS; SCANDIUM COMPOUNDS; SCANDIUM SELENIDES; SCANDIUM SULFIDES; SELENIDES; SELENIUM COMPOUNDS; SULFIDES; SULFUR COMPOUNDS; SYNTHESIS; TEMPERATURE RANGE; TEMPERATURE RANGE 0000-0013 K; TEMPERATURE RANGE 1000-4000 K; TRANSITION ELEMENT COMPOUNDS; Lanthanide magnetism; Interlanthanide chalcogenide; Mixed-lanthanide chalcogenide; Antiferromagnetism; Transition temperature; Photonic band gap; Free ion; Curie-Weiss law; Magnetic moments; Gadolinium; Magnetic transitions; Magnetic susceptibility; Chalcogenides; Weak ferromagnetism; Rare earths; Optical properties; Scandium; Magnetism; Magnetic materials
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1016/j.jssc.2009.02.002

Three gadolinium scandium chalcogenides have been synthesized using Sb 2 Q 3 ( Q=S, Se) fluxes at 975 °C. Gd 3.04Sc 0.96S 6, GdScS 3, and Gd 1.05Sc 0.95Se 3 are crystallized in U 3ScS 6 type, GdFeO 3 type, and UFeS 3 type structures, respectively. The magnetic susceptibilities for these compounds follow the Curie–Weiss law above their transition temperatures. The effective magnetic moments are close to calculated values for free Gd 3+ ions. The Weiss constants for Gd 3.04Sc 0.96S 6, GdScS 3, and Gd 1.05Sc 0.95Se 3 are determined to be −3.3(1), −4.5(4), and 1.5(1) K, respectively. Gd 3.04Sc 0.96S 6 orders antiferromagnetically below 9 K. GdScS 3 exhibits an antiferromagnetic ordering below 3 K with a weak ferromagnetism. Gd 1.05Sc 0.95Se 3 undergoes a ferromagnetic transition around 5 K. The optical band gaps for Gd 3.04Sc 0.96S 6, GdScS 3, and Gd 1.05Sc 0.95Se 3 are 1.5, 2.1, and 1.2 eV, respectively. A view of the three-dimensional structure of Gd 3.04Sc 0.96S 6 along the c axis.