Paper Title:
Behavior of Clustered State above the Curie Temperature in La0.78Ca0.22MnO3 Single Crystal
  Abstract

The results of structural neutron diffraction study and the data on the transport and magnetic properties (the linear and nonlinear (second and third order) susceptibilities) are presented for the La0.88Ca0.22MnO3 single crystal. This compound has the orthorhombic Pbnm space group, showing no structural transformations between 90 K and 300 K. It exhibits the paramagnet-ferromagnet (P-F) (TC  186 K) and insulator – metal (I-M) (ТIM  201 K > TC) phase transitions. The measurements of the second harmonic of the magnetization in the parallel ac and dc H magnetic fields, M2(H,T), showed that below T* 252 K, the FM clusters appear in the PI matrix undergoing the second-order transition. The concentration of the FM clusters increases with cooling so that it is above the percolative threshold value below TIM, and the sample exhibits metallic behavior. The M2(H) hysteresis loops possess a high sensitivity to the I-M transition. Their usual central symmetry is broken in the vicinity of TIM and the loops become asymmetric. This effect is attributed to cluster link nucleation-and-growth process.

  Info
Periodical
Solid State Phenomena (Volumes 168-169)
Main Theme
Edited by
V. Ustinov
Pages
485-488
DOI
10.4028/www.scientific.net/SSP.168-169.485
Citation
V.A. Ryzhov, A.V. Lazuta, O.P. Smirnov, V.P. Khavronin, P.L. Molkanov, Y.M. Mukovskii, V.I. Chichkov, "Behavior of Clustered State above the Curie Temperature in La0.78Ca0.22MnO3 Single Crystal", Solid State Phenomena, Vols. 168-169, pp. 485-488, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Subham Chatterjee, S. Giri, S.K. De, S. Majumdar
Abstract:Ferromagnetic shape memory alloy of nominal composition Ni50Mn35Sn15 has been investigated by magnetic and transport measurements. Clear...
215
  | Authors: Patricia Lázpita, Volodymyr A. Chernenko, José M. Barandiarán, Iñaki Orue, Jon Gutiérrez, Jorge Feuchtwanger, José Alberto Rodriguez-Velamazán
Abstract:A Mn-enriched Ni46.4Mn32.8Sn20.8 Heusler alloy has been prepared by the induction melting and casting method. The samples used were annealed...
89
Authors: N.N. Stepanova, S.Yu. Mitropolskaya, D.I. Davidov, N.V. Kazantseva
Abstract:Paramagnetic VKNA superalloy on the base of Ni3Al intermetallic phase (L12 superlattice) under cold rolling deformation demonstrates...
185
Authors: E. Voronina, Eugene P. Yelsukov, A.V. Korolyov, H.H. Klauss, T. Dellmann, S.A. Granovsky
VIII. Magnetism of Nanostructures
Abstract:The results of X-ray diffraction, complex in-field (up to 9 T) and temperature (5300 К) Mössbauer and magnetometric studies of the ordered...
534
Authors: A. Patselov, M.A. Milyaev, R. Eshchenko
III. Soft and Hard Magnetic Materials
Abstract:The results of magnetization measurements on Ti3Al intermetallic depending on deuterium concentration as well as structural...
213