Progress of Cryogenics and Isotopes Separation

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The National Conference with international participation on New Cryogenic and Isotope Technologies for Energy and Environment - EnergEn 2018 is organized by the National Research-Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Valcea with the scientific participation of the University of Pitesti and the University of Craiova and will be held at Baile Govora, in 2018.
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INFLUENCE OF Mn SUBSTITUTION WITH Fe/Co ON MAGNETIC STRUCTURE AND TRANSPORT MECHANISMS IN SOME MANGANITES

 

 

Mihail-Liviu Craus1, 2*, Valeryi Simkin2,  Nicoleta Cornei3 and Viorel Dobrea1

 

1National Institute of Research and Development for Technical Physics, Iasi, Romania

 

 

ABSTRACT

 

Many manganites are known as ferromagnetic materials, with a “bad metal” behavior, and a transition temperature close to Curie temperature. The manganites with La0.54Ho0.11Sr0.35Mn1-x(Co/Fe)xO3 were prepared by means of sol-gel methods. The treated samples were monitorized by XRD, while magnetic properties of the samples were investigate with a Foner type magnetometer, between 77 and 400 K, using a magnetic field H=1.4 T. Magnetoresistance data were obtained with a four probe method, in a magnetic field Hmax = 1 T, between 7 and 350 K. Treated samples contain only perovskite type phases, depending on the Mn substitution. Structure modification, magnetic properties and transport mechanisms are discussed, in agreement with the Sr/Ca doping. 

 

KEYWORDS: manganites, magnetic/crystalline structure, magnetoresistance, transport mechanisms

* Corresponding author:  e-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

2Joint Institute for Nuclear Research, Dubna, 141980, Russia

3”Al.I.Cuza” University,, Chemistry Departament, Iasi, Romania