Search for: All records

Transition‐metal borides (TMBs) containing B_n‐fragment (n>3) have recently gained interest for their ability to enable exciting magnetic materials. Herein, we show that the B₄‐containing TiFe_0.64(1)Os_2.36(1)B₂is a new ferromagnetic TMB with a Curie temperature of 523(2) K and a Weiss constant of 554(3) K, originating from the chain ofM₃‐triangles (M=64 %Fe+36 %Os). The new phase was synthesized from the elements by arc‐melting, and its structure was elucidated by single‐crystal X‐ray diffraction. It belongs to the Ti_1+xOs_2−xRuB₂‐type structure (space groupP2 m, no. 189) and contains trigonal‐planar B₄boron fragments [B−B distance of 1.87(4) Å] interacting withM₃‐triangles [M–Mdistances of 2.637(8) Å and 3.0199(2) Å]. The experimental results were supported by computational calculations based on the ideal TiFeOs₂B₂composition, which revealed strong ferromagnetic interactions within and between the Fe₃‐triangles. This discovery represents the first magnetically ordered Os‐rich TMB, thus it will help expand our knowledge of the role of Os in low‐dimensional magnetism of intermetallics and enable the design of such materials in the future.