YCa₃(VO)₃(BO₃)₄: A Kagomé Compound Based on Vanadium(III) with a Highly Frustrated Ground State

Abstract

A new S = 1 kagom e compound based on vanadium(III) is reported. The structure was refined simultaneously against single-crystal neutron and X-ray diffraction data, as a gaudefroyite-type with a new supercell (a 0 = 2a þ b, b 0 = -a -2b, c 0 = c) driven by the ordering of columns of isolated triangular BO 3 3ions. Low-temperature neutron powder diffraction and magnetic (dc and ac susceptibility) data rule out the presence of long-range magnetic order above at least 1.5 K, but specific heat data suggest that the ground state involves shortrange magnetic order, which is frustrated by the coexistence/ competition of FM and AFM correlations, together with the characteristic geometric frustration of the kagom e lattice. Magnetic susceptibility data rule out a spin-glass state, pointing to an exotic ground state comparable to the spin-ice or spin-liquid states. This makes YCa 3 (VO) 3 (BO 3 ) 4 one of the most highly frustrated experimental realizations of the kagom e lattice yet discovered.

LaSrVO4: A candidate for the spin-orbital liquid state

“…The main features of C mag /T as plotted in Fig. 6(b) are (i) a broad peak around 11 K, which should be related to the susceptibility peak; (ii) a sharp increase below 1 K, which could be related to the nuclear Schottky anomaly for V ions at low temperatures as observed for other V compounds [33]; (iii) the specific heat does not change at 9 T besides the small shift of the 11 K feature; (iv) the magnetic entropy calculated by integrating C mag /T between 1 K and 30 K yields an entropy variation of 0.37 J/mol K [inset of Fig. 6(b)], which is just 4.1% of R ln(3) for a S = 1 system, where R is the gas constant; (v) C mag follows a T 2 behavior between 1 K and 9 K.…”

Synthesis of a d2 kagome lattice antiferromagnet, (CH3NH3)2NaV3F12

“…[26][27][28] The YCa 3 (VO) 3 (BO 3 ) 4 is an interesting S ¼ 1 KLAF with a possible QSL state. 29,30 The short interlayer distance ($2.9 A) in comparison to the distance between neighboring vanadium within layers ($5.3 A) and the weak ferromagnetic interactions deviate this compound from an ideal two-dimensional S ¼ 1 KLAF analyte. As a result, there is no phase stable kagome lattice system with S ¼ 1 ions that are antiferromagnetically coupled and does not present structural perturbations.…”

Nematic and supernematic phases in kagome quantum antiferromagnets under the influence of a magnetic field

“…For example, BaNi 3 (OH) 2 (VO 4 ) 2 shows a glassy behavior at low temperature whose origin is still unknown [26]. Nevertheless, experimental behaviors suggestive of a spin gap have been seen in YCa 3 (VO) 3 (BO 3 ) 4 [27] and KV 3 Ge 2 O 9 [28] and Kagome compounds based on spin-1 V 3+ ions. Although current single crystals might still contain a sizable amount of impurities [27] or competing ferromagnetic interactions might be present [28], such materials might nevertheless be good candidate to observe the exotic physical behaviors described here.…”