Fe ion doping effect on electrical and magnetic properties of La0.7Ca0.3Mn1−xFexO3 (0≤x≤1)

Abstract

a b s t r a c tHere we report the structural, electrical and magnetic properties of Fe doped La 0.7 Ca 0.3 Mn 1−x Fe x O 3 (LCMFO; 0 ≤ x ≤ 1) prepared by conventional solid state reaction method. Simulated data on XRD shows an increase in volume with an increase in Fe ion concentration. XPS supports that Fe 3+ ions directly substitute Mn 3+ ions. Shifting towards lower wave number and symmetric IR band structure confirms increase in volume and homogeneous distribution of Fe ions. Fe ion does not contribute in double-exchange (DE) conduction mechanism due to its stable half filled 3d orbital. The presence of Fe 3+ ions encourages anti-ferromagnetism (AFM) generated by super-exchange interaction and suppress insulator-metal transition temperature (T IM ). Magnetic measurements show the existence of magnetic polarons supported by increase in volume of unit cell and deviation from Curie-Weiss law.

Effect of Ag addition on the magnetic and electrical properties of La0.67Ca0.33MnO3 films

“…4a shows overall X-ray photoemission spectroscopy of the LCMO:Ag x (x = 0, 0.20) films at room temperature. The binding energies and peaks match well with the earlier reported data [16]. All the elements (La, Ca, Mn and O) are observed in the sample surface, and there is a relatively weak peak area of Ag 3d of LCMO:Ag 0.20 .…”

Spin-phonon coupling and high-pressure phase transitions ofRMnO3(R=Caand Pr): An inelastic neutron scattering and first-principles study

“…The study of perovskite manganite RMnO 3 (R= Ca, La, Pr etc) has been of great relevance [6][7][8][9][10][11][12][13][14][15][16][17]. Among these, CaMnO 3 has received much interest in the past decade due to its structural [18], physical [19], magnetic [20], and thermo-electrical properties [21,22].…”

Thermal properties of MnO2 and SiO2 containing phosphate glasses

“…In all glasses, constant quantities of P 2 O 5 , K 2 O, and SiO 2 were kept, and the increasing amount of MnO 2 was introduced at the expense of the decreasing amount of MgO and CaO, with the constant MgO/CaO ratio. The glasses were produced by traditional melting of a mixture of raw materials, i.e., (NH 4 ) 2 HPO 4 , SiO 2 , K 2 CO 3 , MgO, CaCO 3 and MnO 2 at 1100°C. All glasses were ground to grain size of 0.1-0.3 mm.…”

“…Spectra of selected devitrificates are presented in and 1010 cm -1 which corresponded to Si-O bonds characteristic for diopside [22]. The existence of absorption bands at about 500, 560, 725, 1000 and 1086 cm -1 could be attributed to the P-O stretching modes of PO 3 [22]. From the presented analysis of crystallization products, the consistency of the type of the crystallizing phases can be seen with the well-known classification of phosphate glasses, based on the O/P ratio [25].…”

“…Phosphate glasses have been extensively studied in recent years because of their interesting applications such as containment of radioactive waste [1], bio-implants [2], magnetic information storage [3], solid-state batteries [4] and agricultural fertilizers with controlled solubility [5]. Manganese ions have been frequently used for exploring the structure and properties of various kinds of glasses, not only phosphate but also borate [6] and silicate ones [7].…”