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

Hinatsu, Yukio; Doi, Yoshihiro; Wakeshima, Makoto

doi:10.1016/j.jssc.2013.08.020

Cited by 9 publications

(3 citation statements)

References 41 publications

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“…In this temperature range, higher energy crystal field levels are populated by thermal excitations leading to a large Weiss temperature (θ CW = −72.68 (1) K); this is commonly observed in rare-earth magnetic systems. 28,29 The effective moment μ eff = 3.54(10) μ B is in close agreement with the expected effective magnetic moment for Pr 3+ . 30 This confirms that praseodymium is in a +3 oxidation state.…”

Section: Magnetismmentioning

confidence: 99%

Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO_3+δ (0 ≤ δ < 0.5)

et al. 2016

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The YPrO3+δ system is a nearly ideal model system for the investigation of oxide defect creation and annihilation in oxide ion conductor related phases with potential applications as solid state electrolytes in solid oxide fuel cells. The formation, structure, high temperature reactivity, and magnetic susceptibility of phase pure YPrO3+δ (0 ≤ δ ≤ 0.46) are reported. The topotactic reduction and oxidation of the YPrO3+δ system was investigated by powder X-ray in situ diffraction experiments and revealed bixbyite structures (space group: Ia3̅) throughout the series. Combined neutron and X-ray data clearly show oxygen uptake and removal. The research provides a detailed picture of the Y(3+)/Pr(3+)/Pr(4+) sublattice evolution in response to the redox chemistry. Upon oxidation, cation site splitting is observed where the cation in the ((1)/4, (1)/4, (1)/4) position migrates along the body diagonal to the (x, x, x) position. Any oxygen in excess of YPrO3.0 is located in the additional 16c site without depopulating the original 48e site. The in situ X-ray diffraction data and thermal gravimetric analysis have revealed the reversible topotactic redox reactivity at low temperatures (below 425 °C) for all compositions from YPrO3 to YPrO3.46. Magnetic susceptibility studies were utilized in order to further confirm praseodymium oxidation states. The linear relation between the cubic unit cell parameter and oxygen content allows for the straightforward determination of oxygen stoichiometry from X-ray diffraction data. The different synthesis strategies reported here are rationalized with the structural details and the reactivity of YPrO3+δ phases and provide guidelines for the targeted synthesis of these functional materials.

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Section: Magnetismmentioning

confidence: 99%

Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO_3+δ (0 ≤ δ < 0.5)

et al. 2016

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“…Different kinds of B' and B" ion should show a variety of the physical properties of double perovskite oxides. Since highly oxidized cations from the second or third transition series sometimes show quite unusual magnetic behavior, it attracts great attention to study the preparation and magnetic properties of double perovskite oxides containing both rare earth and such transition metals, A 2 LnMO 6 (A = Sr, Ba; Ln = rare earths; M = Ru, Os, Ir, Re) [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Magnetic interactions in rhenium-containing rare earth double perovskites Sr 2 LnReO 6 (Ln=rare earths)

Nishiyama

Doi

Hinatsu

2017

Journal of Solid State Chemistry

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“…In addition to the number of unpaired electrons as a variable, changing the ionic radius of ions alters the crystal structure and, in turn, varies the magnetic properties. These systems have provided interesting benchmark models for understanding structure–property interplay in materials science. − More recently, attention has been devoted to systems with two magnetic ions in B -site ordered double perovskites (DPs). These systems are composed of a 3d transition metal ion along with Os in B and B′ positions, respectively.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure, and Cooperative 3d–5d Magnetism in Rock Salt Type Li₄NiOsO₆ and Li₃Ni₂OsO₆

et al. 2020

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Two new transition metal oxides with the nominal chemical compositions of Li4NiOsO6 and Li3Ni2OsO6 were successfully synthesized. Both compounds crystallize in an ordered rock salt structure type in the monoclinic C2/m space group. The crystal structures were determined using both synchrotron X-ray and time-of-flight neutron, powder diffraction data. In both phases, Ni2+ ions are present while oxidation states of osmium are +6 and +5 in Li4NiOsO6 and Li3Ni2OsO6, respectively. Ni2+ ions in the hypothetical fully ordered phase form a honeycomb arrangement in the ab crystallographic plane and these hexagons are centered by osmium ions. The magnetic layers are separated along the c axis by the octahedra, which are centered by Li+ (or Li+/Ni2+, depending on the chemical compositions). Crystal structure refinements reveal that there is some degree of mixed occupancy in cationic positions. Temperature dependent magnetic susceptibility data for both phases show ferrimagnetic transitions with predominant antiferromagnetic (AFM) interactions among 3d electrons of nickel and 5d electrons of osmium. Iso-thermal magnetization loops as a function of the applied magnetic field below the transition temperatures confirm the ferrimagnetic nature in magnetic transitions. Temperature dependent heat capacity data, however, did not exhibit any anomaly in either phase, indicating the absence of long-range magnetic ordering. The lack of long-range order for both Os5+ and Os6+-based compounds was also confirmed by low temperature neutron diffraction data down to 10 K. Temperature dependent AC magnetic susceptibility data in various frequencies for both samples indicate that Li4NiOsO6 exhibits spin-glass-like behavior, while the transition temperature for Li3Ni2OsO6 is nearly frequency independent.

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

Cited by 9 publications

References 41 publications

Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO_3+δ (0 ≤ δ < 0.5)

Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO_3+δ (0 ≤ δ < 0.5)

Magnetic interactions in rhenium-containing rare earth double perovskites Sr 2 LnReO 6 (Ln=rare earths)

Synthesis, Crystal Structure, and Cooperative 3d–5d Magnetism in Rock Salt Type Li₄NiOsO₆ and Li₃Ni₂OsO₆

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

Cited by 9 publications

References 41 publications

Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO3+δ (0 ≤ δ < 0.5)

Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO3+δ (0 ≤ δ < 0.5)

Magnetic interactions in rhenium-containing rare earth double perovskites Sr 2 LnReO 6 (Ln=rare earths)

Synthesis, Crystal Structure, and Cooperative 3d–5d Magnetism in Rock Salt Type Li4NiOsO6 and Li3Ni2OsO6

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Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO_3+δ (0 ≤ δ < 0.5)

Order/Disorder and in Situ Oxide Defect Control in the Bixbyite Phase YPrO_3+δ (0 ≤ δ < 0.5)

Synthesis, Crystal Structure, and Cooperative 3d–5d Magnetism in Rock Salt Type Li₄NiOsO₆ and Li₃Ni₂OsO₆