Change in the Magnetocapacity in the Paramagnetic Region in a Cation-Substituted Manganese Selenide

2017 ◽  
Vol 60 (4) ◽  
pp. 673-680
Author(s):  
S. S. Aplesnin ◽  
M. N. Sitnikov ◽  
A. M. Zhivul’ko
Keyword(s):  
Paramagnetic Region ◽  
Manganese Selenide

scholarly journals Смена знака магнитоемкости в парамагнитной области в катион-замещенном селениде марганца

2018 ◽  
Vol 60 (4) ◽  
pp. 670
Author(s):  
С.С. Аплеснин ◽  
М.Н. Ситников ◽  
А.М. Живулько
Keyword(s):  
Magnetic Field ◽  
Solid Solution ◽  
Magnetic Susceptibility ◽  
Dielectric Loss ◽  
Dielectric Permittivity ◽  
Room Temperature ◽  
Frequency Range ◽  
Wagner Model ◽  
Paramagnetic Region ◽  
Orbital Electron

AbstractThe capacity and the dielectric loss tangent of a Gd_ x Mn_1– x Se ( x ≤ 0.2) solid solution have been measured in the frequency range 1–300 kHz without a magnetic field and in a magnetic field of 8 kOe in the temperature range 100–450 K, and the magnetic moment of the solid solution has been measured in a field of 8.6 kOe. The magnetocapacity effect and the change in the magnetocapacity sign have been observed in room temperature in the paramagnetic region. A correlation of the changes in the dielectric permittivity and the magnetic susceptibility with temperature has been revealed. The magnetocapacity is described using the model with orbital electron ordering and the Maxwell–Wagner model.

Mesoporous manganese-selenide microflowers with enhanced electrochemical performance as a flexible symmetric 1.8 V supercapacitor

2020 ◽  
Vol 382 ◽  
pp. 122814 ◽  
Author(s):  
Muhammad Sufyan Javed ◽  
Syed Shoaib Ahmad Shah ◽  
Shahid Hussain ◽  
Shaozao Tan ◽  
Wenjie Mai
Keyword(s):  
Electrochemical Performance ◽  
Manganese Selenide ◽  
Enhanced Electrochemical Performance

INFLUENCE OF GRAIN SIZE ON MAGNETOCALORIC EFFECT IN THE NANOCRYSTALLINELa0.8Te0.2MnO3

2011 ◽  
Vol 10 (04n05) ◽  
pp. 597-600
Author(s):  
RABINDRA NATH MAHATO ◽  
K. SETHUPATHI ◽  
V. SANKARANARAYANAN
Keyword(s):  
Grain Size ◽  
Landau Theory ◽  
Sol Gel ◽  
Entropy Change ◽  
Ferromagnetic Transition ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Paramagnetic Region ◽  
Rhombohedral Crystal Structure ◽  
Crystallite Sizes

The nanocrystalline La0.8Te0.2MnO3samples are prepared by sol-gel method and show rhombohedral crystal structure with R3c space group at room temperature. The calculated crystallite sizes are ~55 nm, 40 nm and 25 nm for calcined at 700°C, 800°C and 900°C temperatures. The SEM images show the grain size increases as the calcination temperature increases and the values are in good agreement with that obtained from X-ray diffraction analysis. The samples undergo paramagnetic to ferromagnetic transition and follow Curie–Weiss law in the paramagnetic region. The maximum entropy change are ~3.2 J kg-1K-1, 3 J kg-1K-1and 2 J kg-1K-1for a field change of 20 kOe for 55 nm, 40 nm and 25 nm samples respectively. In the framework of Landau theory of phase transition, the experimentally observed magnetic entropy change and theoretical predicted model fits well for all the nanoparticles.

SPIN CORRELATIONS OF THE MAGNETORESISTIVE BILAYER MANGANITE La1.2Sr1.8Mn2O7

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3820-3822
Author(s):  
S. Rosenkranz ◽  
R. Osborn ◽  
J. F. Mitchell ◽  
L. Vasiliu-Doloc ◽  
J. W. Lynn ◽  
...  
Keyword(s):  
Colossal Magnetoresistance ◽  
Double Exchange ◽  
Hole Mobility ◽  
Ferromagnetic Transition ◽  
Double Exchange Interaction ◽  
Metal Insulator ◽  
Spin Correlations ◽  
Paramagnetic Region ◽  
X Ray Scattering ◽  
Good Agreement

We review our recent neutron and X-ray scattering studies of the 40% hole doped bilayer manganite La 1.2 Sr 1.8 Mn 2 O 7, which exhibits colossal magnetoresistance above the ferromagnetic transition at T C~113 K. In the paramagnetic region, static diffuse scattering reveals the existence of correlated charges. However, the good agreement of the in-plane spin correlations with the conventional model for quasi two-dimensional XY magnets indicates that the metal-insulator transition is driven by the growth of magnetic correlations. Across the transition, the competition between antiferromagnetic superexchange and ferromagnetic double exchange, observed as canted correlations between spins in neighboring layers within each bilayer, is strongly reduced, indicating a direct link of the double exchange interaction to the hole mobility.

Electrodeposition of Ruthenium-Doped Manganese Selenide for Energy-Related Materials

2020 ◽  
Vol MA2020-02 (15) ◽  
pp. 1422-1422
Author(s):  
Agnieszka Brzozka ◽  
Joanna Bienias ◽  
Grzegorz Dariusz Sulka
Keyword(s):  
Manganese Selenide
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