Magnetic properties of the antiferromagnetic double perovskite Ba₂PrRuO₆

Abstract

The ordered perovskite compound Ba2PrRuO6 is prepared and its magnetic properties are investigated. The Rietveld analysis of the neutron diffraction profiles measured at 150 K shows that the Pr3+ and Ru5+ ions are arranged with regularity over the six-coordinate B sites of the perovskite ABO3 and that Ba2PrRuO6 belongs to space group P21/n, with a = 6.0063(5), b = 5.9863(4), c = 8.4677(7) Å and 90.04(2)°. The magnetic susceptibility and the heat capacity measurements show that this compound transforms to an antiferromagnetic state below 117 K. From the neutron diffraction patterns measured at 7 K, the magnetic structure is determined to be of Type I and the magnetic moments of Pr3+ and Ru5+ are estimated to be 2.2(1) and 2.0(2) µB, respectively. Their values are discussed on the basis of theoretical calculations for the crystal field splitting.

High-temperature thermoelectric properties of the double-perovskite ruthenium oxide (Sr1−xLax)2ErRuO6

“…[15][16][17][18][19] In addition, a possible high-temperature superconductivity has been discussed in Sr 2 LRu 1−x Cu x O 6 .…”

Antiferromagnetic transitions of osmium-containing rare earth double perovskites Ba2LnOsO6 (Ln=rare earths)

“…Such highly oxidized cations from the second or third transition series sometimes show quite unusual magnetic behavior. Any of the double perovskites Ba 2 LnRuO 6 (Ln = La ~ Lu) [2,4,5,[9][10][11][12] and Sr 2 LnRuO 6 (Eu ~ Lu) [3,4,[6][7][8][12][13][14] show an antiferromagnetic transition at low temperatures, and the transition temperature is higher than that for the compounds in which the magnetic ion at the B site is Ru 5+ ion only. Among them, the transition temperature for Ba 2 PrRuO 6 is astonishingly as high as 117 K [10], and Ba 2 NdRuO 6 transforms to the antiferromagnetic state at 57 K [9].…”

“…Not the A site ions but the B site ions normally determine the physical properties of the perovskites [1] The solid-state chemistry of such mixed-metal oxides containing platinum group metals has attracted a great deal of interest. The preparation, crystal structures and magnetic properties of double perovskite oxides containing Ru ion, A 2 LnRuO 6 (A = alkali-earth metals), where Ln represents a rare earth ion, have been studied [2][3][4][5][6][7][8][9][10][11][12][13][14]. The electronic configuration of Ru 5+ is…”

Structure and magnetic properties of double perovskites SrCaLnRuO6 (Ln=La, Pr, Nd)

“…Such highly oxidized cations from the second or third transition series sometimes show quite unusual magnetic behavior. Any of the double perovskites Ba 2 LnRuO 6 (Ln = La ~ Lu) [2,4,5,[9][10][11][12] and Sr 2 LnRuO 6 (Eu ~ Lu) [3,4,[6][7][8][12][13][14] showed an antiferromagnetic transition at low temperatures, and the transition temperature is higher than that for the compounds in which the magnetic ion at the B site is Ru 5+ ion only. Among them, the transition temperature for Ba 2 PrRuO 6 was astonishingly as high as 117 K [10], and Ba 2 NdRuO 6 transformed to the antiferromagnetic state at 57 K [9].…”