Publication Date:
2018
Description:
〈p〉Publication date: 15 February 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Journal of Magnetism and Magnetic Materials, Volume 472〈/p〉
〈p〉Author(s): Shu Guo, Tai Kong, F. Alex Cevallos, Karoline Stolze, R.J. Cava〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉Crystals of the KBa〈em〉R〈/em〉(BO〈sub〉3〈/sub〉)〈sub〉2〈/sub〉 (〈em〉R〈/em〉 = Y, Gd, Tb, Dy, Ho, Tm, Yb and Lu) rare earth borates were grown by spontaneous nucleation from a KF-B〈sub〉2〈/sub〉O〈sub〉3〈/sub〉 flux. The crystals obtained were typically well-developed hexagonal plates about 1 mm in large dimension. The crystals were used to study the anisotropic temperature and field dependent magnetization of the materials, which are based on ideal triangular planes of magnetic rare earths. All structures were refined in space group R〈math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"〉〈mrow〉〈mover〉〈mn〉3〈/mn〉〈mo〉-〈/mo〉〈/mover〉〈/mrow〉〈/math〉m by single-crystal X-ray diffraction, and in addition to the equilateral triangular rare earth plane lattice, displayed K/Ba site occupancy disorder. All magnetic compounds reveal dominantly antiferromagnetic spin interactions with no magnetic ordering above 1.8 K. With the exception of KBaGd(BO〈sub〉3〈/sub〉)〈sub〉2〈/sub〉, magnetic anisotropy was observed for other five magnetic members of the family. The results suggest that KBa〈em〉R〈/em〉(BO〈sub〉3〈/sub〉)〈sub〉2〈/sub〉 crystals may be of further interest for investigating the magnetic properties of rare earth ions on a triangular lattice.〈/p〉〈/div〉
〈/div〉
Print ISSN:
0304-8853
Electronic ISSN:
1873-4766
Topics:
Physics
