Studies on magnetic and calorimetric properties of double perovskites Ba2HoRuO6 and Ba2HoIrO6

Growth of single crystals of the new double perovskite Ba2HoRu1−xCuxO6 from high temperature solutions

“…The structural analysis was made with the software provided along with the Philips X-ray diffractometer, Philips Xpert Plus. The best fit was obtained for a monoclinic P2 1 /n space group with lattice parameters a ¼ 5:875ð2Þ, b ¼ 5:874ð3Þ, c ¼ 8:960ð1Þ and b ¼ 89:995ð2Þ1 which are found to be very close to those reported by Hinatsu et al [9]. Even though it was possible to index this to a cubic Fm-3 m (225) space group with lattice parameters of a ¼ 8:314ð1ÞÅ and V ¼ 574:685Å 3 , all the reflections were not indexed.…”

“…3 (a) and (b) for x ¼ 0 and x ¼ 0:l respectively in the temperature range 4.5-300 K. In the case of x ¼ 0 sample a single anomaly is observed at 6.5 K. Three anomalies are observed in the case of x ¼ 0:1 sample at 6.5, 20 and 48 K. The anomalies at 18 and 48 K were also reported on bulk samples by Hinatsu et al [9] who discussed their possible origin. The temperature variation of the susceptibility in the paramagnetic region (100-300 K) is observed to follow the Curie-Weiss law from which the Weiss constant (y) and effective magnetic moment (m eff ) were evaluated.…”

“…We have grown single crystals of some of these materials and reported their properties [7,8]. Recently Hinatsu et al [9] reported the structure and magnetic properties of Ba 2 HoRuO 6 . We tried growing single crystals of both pure Ba 2 HoRuO 6 and the solid solutions Ba 2 HoRu 1Àx Cu x O 6 , using PbO-PbF 2 mixture as a solvent as in the earlier work [7].…”

On the space group of the double perovskite Ba2PrIrO6

“…Ba 2 TlSbO 6 (t ¼ 0:993) [13], Ba 2 YSbO 6 (t ¼ 0:99), Ba 2 HoSbO 6 (t ¼ 0:99) [14] and Ba 2 YIrO 6 (t ¼ 0:997) [10], all have tolerance factors close to unity. We have noticed too that Hinatsu et al [15] have corrected their earlier description of the structure as monoclinic in the case of Ba 2 HoMO 6 (M ¼ Ru, Ir). However, they did not comment on the other double perovskites Ba 2 LnMO 6 (Ln ¼ lanthanide; M ¼ Ru and Ir).…”

General study on the crystal, electronic and band structures, the morphological characterization, and the magnetic properties of the Sr 2 DyRuO 6 complex perovskite

“…In Ba 2 ErRuO 6 , an anomaly at T=40 K related to an antiferromagnetic ordering of Ru 5+ ions appears [28], while Ba 2 HoRuO 6 shows two transitions at T=50 K and T=22 K because of an antiferromagnetic ordering of the Ru 5+ ions and a magnetic interaction between Ho 3+ ions, respectively, and Ba 2 HoIrO 6 presents paramagnetic behaviour down to T=1.8 K [29].…”