Structural, Magnetic and Electrical Properties of the Slightly Doped Lanthanum Manganites

A.R. Bulatov; K.G. Bogdanova; V.A. Golenischev-Kutuzov; L.V. Elokhina; E.A. Neifel’d; A.V. Korolev

doi:10.4028/www.scientific.net/SSP.168-169.481

Paper Titles

Phase Diagram of Spin States and Magnetic Interactions in Isotope Substituted (Pr,Eu)_0.7Ca_0.3CoO₃
p.465

Ferromagnetism in the Highly-Correlated Hubbard Model
p.469

Spin Polarons at High Temperatures in Undoped Lanthanum Manganites
p.473

Magnetic State of Y₃Fe_5-XSc_xO₁₂ Garnets
p.477

Structural, Magnetic and Electrical Properties of the Slightly Doped Lanthanum Manganites
p.481

Behavior of Clustered State above the Curie Temperature in La_0.78Ca_0.22MnO₃ Single Crystal
p.485

Concentration Dependence of Localized Magnetic Moments of Hybridized Electron States at the Impurities of Transition Elements in Semiconductors
p.489

Transport Properties of FeSi with Cobalt Impurities
p.493

Spontaneous Magnetization and Antiferromagnetic Correlations in Low-Dimensional Quantum (S=1/2) Single Crystal LiCu₂O2+Δ
p.497

HomeSolid State PhenomenaSolid State Phenomena Vols. 168-169Structural, Magnetic and Electrical Properties of...

Structural, Magnetic and Electrical Properties of the Slightly Doped Lanthanum Manganites

Abstract:

The temperature dependences of the transverse and longitudinal hypersound velocities at the frequencies (0.5-0.7) GHz were measured in the La1-xSrx MnO3 (x = 0.125; 0.15; 0.175) compositions. Structural phase transitions the position of which is confirmed by the electric resistance and magnetic measurements data for the same samples are observed. These results were analyzed within the model of the competing Jahn-Teller distortions and magnetic ordering. Anomalies in the behavior of the longitudinal hypersound velocities were related to the local Jahn-Teller distortions the suppression of which upon magnetic ordering is considered as a possible origin of a colossal magnetoresistance.