Crystal structures and magnetic properties of iron borates containing lanthanides Sr6LnFe(BO3)6 (Ln = La, Pr, Nd, Sm Lu)

Abstract

a b s t r a c tThe crystal structures and magnetic properties of borate compounds Sr 6 LnFe(BO 3 ) 6 (Ln ¼ La, Pr, Nd, SmeLu) were investigated. These compounds crystallize in a hexagonal structure with space group R3, in which the Ln and Fe ions form one-dimensional chain structure. From the results of structural analysis, it was found that there is an anti-site disorder between Sr and Ln sites, and its chemical formula can be represented as (Sr 6ex Ln x )(Ln 1ex Sr x )Fe(BO 3 ) 6 . The value of x increases with ionic radius of Ln 3þ . The results of magnetic susceptibility measurements show that all the Sr 6 LnFe(BO 3 ) 6 are paramagnetic, and the onset of an antiferromagnetic ordering was observed below~3 K from the specific heat measurements.

Magnetic Properties of Quasi-One-Dimensional Lanthanide Calcium Oxyborates Ca4LnO(BO3)3

“…These results contribute to the rapidly growing set of lanthanide–alkaline earth borates with low-dimensional structures and novel magnetic properties, such as the Sr 6 Ln Fe(BO 3 ) 6 , Ba 3 Ln (BO 3 ) 3 , and A Ba Ln (BO 3 ) 2 ( A = Na + , K + , Rb + ) structural families. 31 , 38 , 48 − 51 Furthermore, the Ca 4 Ln O(BO 3 ) 3 structure type is compositionally flexible, which should allow for the realization of novel low-dimensional magnetic lattices through chemical substitution.…”

Two New Ferroborates with Three‐Dimensional Framework and Wide Transmittance Window

“…It may be the high ratio of B atoms in Li 5 MSrFeB 12 O 24 (M = Mg, Zn) makes B atoms to polymerize. Besides, the [FeO] units are polymerized to form chains or frameworks in the most compounds except for isolated [Fe 2 O 7 ] units in K 2 Fe 2 B 2 O 7 , isolated [FeO 6 ] units in Sr 6 LuFe(BO 3 ) 6 , Sr 6 LaFe(BO 3 ) 6 , and Li 5 MSrFeB 12 O 24 (M = Mg, Zn). The discovery of Li 5 MSrFeB 12 O 24 (M = Mg, Zn) enriches the family of ferroborates.…”

“…The [FeO] units can further combine with [BO] units forming multiple types of structures. [30][31][32] Due to the peculiar physicochemical characteristic of Fe, ferroborates exhibit intriguing magnetic properties. For example, FeBO 3 is a good material in magneto-optic applications with appropriate transparency in with Ba 2 MgB 6 O 12 based on cation cosubstitution was also discussed to better understand the crystal structures of the visible region.…”

“…They can either isolate or combine to form the [FeO] units by corner‐sharing or edge‐sharing O atoms. The [FeO] units can further combine with [BO] units forming multiple types of structures . Due to the peculiar physicochemical characteristic of Fe, ferroborates exhibit intriguing magnetic properties.…”

Magnetic properties of quasi-one-dimensional lanthanide calcium oxyborates Ca$_4$LnO(BO$_3$)$_3$

“…These results contribute to the rapidly growing set of lanthanide-alkaline earth borates with low-dimensional structures and novel magnetic properties, such as the Sr 6 LnFe(BO 3 ) 6 , Ba 3 Ln(BO 3 ) 3 and ABaLn(BO 3 ) 2 (A = Na + , K + , Rb + ) structural families. 31,38,[48][49][50][51] Furthermore, the Ca 4 LnO(BO 3 ) 3 structure type is compositionally flexible, which should allow for the realisation of novel low-dimensional magnetic lattices through chemical substitution.…”