Рубрики:
LN(1-X)SR(X)COO(3-DELTA) LN
COBALTATE PEROVSKITES
Кл.слова (ненормированные):
Rare earth cobalt oxide solid solutions -- Layered perovskite-type cobalt oxides -- Structural -- Magnetic -- Electronic -- Dilatation properties
LN(1-X)SR(X)COO(3-DELTA) LN
COBALTATE PEROVSKITES
Кл.слова (ненормированные):
Rare earth cobalt oxide solid solutions -- Layered perovskite-type cobalt oxides -- Structural -- Magnetic -- Electronic -- Dilatation properties
Аннотация: Single-phase samples of the layered perovskite-like cobalt oxides Ln0.2Sr0.8CoO3-δ (Ln = Sm, Gd, Dy) with the same oxygen nonstoichiometry index δ = 0.37 ± 0.01 were synthesized. All samples are characterized by a tetragonal unit cell with the space group I4/mmm. The structural, magnetic, electric transport and dilatation properties of the obtained samples are investigated. The studied samples are characterized by two anomalies in magnetic properties, a high-temperature maximum near Тm = 350 К with magnetic field hysteresis below Tm, and a diffuse peak in the intermediate temperature range, which shifts with ionic radius decrease of the rare-earth element to higher temperatures. The high-temperature maxima of the magnetic susceptibility correlate with anomalies in thermal expansion, heat capacity and the features in the temperature dependences of the electrical resistivity, pointing to a strong relationship between the structural, magnetic and electronic degrees of freedom. The given comparative analysis of the experimental data of various substituting rare-earth elements with the same oxygen nonstoichiometry has been carried out for the first time.
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Держатели документа:
RAS, Fed Res Ctr KSC SB, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
RAS, Fed Res Ctr KSC SB, Inst Chem & Chem Technol, Krasnoyarsk 660036, Russia.
Lebedev Phys Inst, Moscow 119991, Russia.
NAS Belarus, Sci Pract Mat Res Ctr, Minsk 220072, BELARUS.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Ioffe Inst, St Petersburg 194021, Russia.
Доп.точки доступа:
Dudnikov, V. A.; Дудников, Вячеслав Анатольевич; Orlov, Yu. S.; Орлов, Юрий Сергеевич; Bushinsky, M. V.; Solovyov, L. A.; Vereshchagin, S. N.; Gavrilkin, S. Yu; Tsvetkov, A. Yu; Gorev, M. V.; Горев, Михаил Васильевич; Novikov, S. V.; Mantytskaya, O. S.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-03-00017]; RFBRRussian Foundation for Basic Research (RFBR) [18-52-00017, F18R-119]; BRFFR [18-52-00017, F18R-119]; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory [18-42-243004, SB RAS V.45.3.3]