Structure and magnetic properties of monovalent doping charge ordering perovskite
Journal Title: Journal of New technology and Materials - Year 2018, Vol 8, Issue 1
Abstract
The present paper reports detailed structural, magnetic and magnetocaloric characterizations of the charge ordered Nd0.5Ca0.4M0.1MnO3 (M=Na, K : NCNMO and NCKMO) polycrystalline samples. Our compounds were synthesized using the solid state reaction at high temperature. Both samples are single phase and crystallize in the orthorhombic structure with Pnma space group. NCNMO (⟨r_A ⟩ = 1.1775 Å) undergoes a charge disordering transition (CO) associated to the paramagnetic (PM)-antiferromagnetic (AFM) phase transition at T < 250 K. The long range AFM ordering seems to from at 35 K, rather than 150 K as previously reported. In the intermediate temperature range, charge ordering occurs while orbital ordering sets in progressively, with no magnetic order. For NCKMO sample (⟨r_A ⟩ = 1.2085 Å), K doping induces the melting of the CO state and the presence of the short-range AFM phase, which is metastable and transforms into the stable ferromagnetic (FM) state. Magnetic characterization shows the signature of AFM-FM ordering and spin-glass coexisting at low temperature. The temperature dependence of magnetic entropy change at high magnetic field values presents some anomalies attributed to the metamagnetic transition, which is of first order.
Authors and Affiliations
Hamdi Trabelsi
Keywords
Related Articles
- EP ID EP449970
- DOI -
- Views 41
- Downloads 0
Simulation Study of Various Layers and Double δ-Doping Effect on Device Performance of InAlAs/InGaAs/InP HEMT
The InAlAs/InGaAs/InP HEMT (High Electron Mobility Transistor) lattice matched to InP offers outstanding high frequency, low noise operation for low-noise amplifiers. In this work, efforts have been made to study and opt...
Numerical simulation of the crystal growth of Ti:Al2O3 material by the µ-PD Technology
In this work we have studied the growth of titanium doped sapphire using the micro-pulling down (µ-PD) technique; we established a numerical, two-dimensional finite volume model in cylindrical coordinates with an axi...
The heterostructure ZnO/Al/SiO2/Si fabrication for Piezoelectric SAW and BAW Transducers and Sensors
Zinc oxide (ZnO) thin films were deposited by pulsed laser deposition technique for making ZnO/Al/SiO2/Si Bulk and Surface Acoustic Wave (BAW and SAW) transducers. The aim is to improve the piezoelectric properties of th...
MOSFETs modeling using artificial neural network
The invention of the transistor in 1948 launched a real technological revolution that continues today there are two families of transistors responding to different operating principles: the bipolar transistors invented i...
Electronic structure and Fano’s antiresonance study of Cr3+ doped BIGaZYTZr fluoride glass
The absorption spectrum of Cr3+ in BIGaZYTZr (30BaF2-18InF3-12GaF3-20ZnF2-10YF3-6ThF4-4ZrF4) fluoride glass is characterized by the presence of features on the 4T2g(4F) absorption band. These features result from interac...