Results 61 to 70 of about 16,793 (198)

Magnetic-induced phonon anisotropy in ZnCr$_2$O$_4$ from first principles

, 2006
We have studied the influence of magnetic order on the optical phonons of the geometrically frustrated spinel ZnCr$_2$O$_4$ from first-principles. By mapping the first-principles phonon calculations onto a Heisenberg-like model, we developed a method to ...
Craig J. Fennie, Karin M. Rabe, U. V. Waghmare, W. Baltensperger   +3 more
core   +1 more source

Origin of the Fangmayu Chromite Deposit, Miyun, Beijing: Constraints from Electron Microprobe Analyses of Cr-Spinel

Yankuang ceshi, 2015
Stratiform chromite deposits in China have long been considered to form by fractional crystallization of mafic magma. However, some researchers recently proposed that some chromite deposits are also hosted in ophiolite.
LI Li-xing, ZHU Ming-yu, FANG Tong-ming, LI Hou-min   +3 more
doaj   +1 more source

Charge density functional plus $U$ calculation of lacunar spinel GaM$_4$Se$_8$ (M = Nb, Mo, Ta, and W)

, 2019
Charge density functional plus $U$ calculations are carried out to examine the validity of molecular $J_\text{eff}$=1/2 and 3/2 state in lacunar spinel GaM$_4$X$_8$ (M = Nb, Mo, Ta, and W).
Han, Myung Joon, Jeong, Min Yong, Lee, Hyunggeun, Ryee, Siheon, Sim, Jae-Hoon, Yoon, Hongkee   +5 more
core   +1 more source

Spin Freezing in the Spin Liquid Compound FeAl2O4

, 2015
Spin freezing in the $A$-site spinel FeAl$_2$O$_4$ which is a spin liquid candidate is studied using remnant magnetization and nonlinear magnetic susceptibility and isofield cooling and heating protocols.
K., Ramesh Kumar, Nair, Harikrishnan S., Strydom, Andre M.   +2 more
core   +1 more source

Influencia de algunas variables del proceso sol–gel en las propiedades texturales y estructurales de un soporte de NiAl₂O₄

Boletín de la Sociedad Española de Cerámica y Vidrio, 2004
In this work some aspects related to the synthesis of nickel aluminate as a ceramic material by the sol–gel processing, are studied. The solids obtained are analyzed by atomic absorption and x ray flourescence in order to determine their chemical ...
Valencia, J. S., Almanza, A.
doaj  

AC susceptibility and $^{51}$V NMR study of MnV$_2$O$_4$

, 2007
We report $^{51}$V zero-field NMR of manganese vanadate spinel of MnV$_2$O$_4$, together with both ac and dc magnetization measurements. The field and temperature dependence of ac susceptibilities show a reentrant-spin-glass-like behavior below the ...
A P Reyes, Baek S-H Choi K-Y Reyes A P Curro N J Dalal N S Zhou H D Wiebe C R, C R Wiebe, Chikazumi S, Freeman A J, Garlea V O Jin R Mandrus D Roessli B Huang Q Miller M Schultz A J Nagler S E, H D Zhou, K-Y Choi, Mydosh J A, N J Curro, N S Dalal, Onoda M, P L Kuhns, Radaelli P G, S-H Baek, Stanley H E, V Ramanchandran, Williams G   +17 more
core   +1 more source

Tuning magnetic frustration on the diamond lattice of the A-site magnetic spinels CoAl$_{2-x}$Ga$_x$O$_4$: Lattice expansion and site disorder

, 2009
The spinels CoB$_2$O$_4$ with magnetic Co$^{2+}$ ions on the diamond lattice A site can be frustrated because of competing near-neighbor ($J_1$) and next-near neighbor ($J_2$) interactions.
Brent C. Melot, Doron L. Bergman, E. M. Stoudenmire, G. Blasse, J. Bérar, Katharine Page, Leon Balents, M. C. Day, Ram Seshadri, Thomas Proffen, W. L. Roth   +10 more
core   +1 more source

Calculation Of The Crystal Field Parameters For Eu3+ Doped In SrAl2O4 And SrIn2O4 Spinels

Annals of West University of Timisoara: Physics, 2012
Strontium aluminate (SrAl2O4) and the indium aluminate (SrIn2O4) spinels have been proven to be efficient host materials, which offer the possibility of generating broadband emission after doping with rare earth trivalent ions.
Stanciu M. L.
doaj   +1 more source

Electrochemical performance of NiCo2O4 and NiCo2O4/Ti3AlC2 composite for supercapacitor applications

Materials Research Express
Supercapacitors are pivotal for the advancement of energy storage technologies, offering unparalleled power density and rapid charge–discharge cycles essential for modern electronic and automotive applications. Combining different materials is a powerful
Shahid M Ramay, Mohammed H Aldosary
doaj   +1 more source

Polar and magnetic order in GaV4Se8

, 2017
In the present work, we provide results from specific heat, magnetic susceptibility, dielectric constant, ac conductivity, and electrical polarization measurements performed on the lacunar spinel GaV4Se8.
Butykai, A., Geirhos, K., Kézsmárki, I., Loidl, A., Lunkenheimer, P., Ruff, E., Stefanet, E., Tsurkan, V., Widmann, S.   +8 more
core   +1 more source