Browsing by Author "Isnard, Olivier"
Now showing items 1-12 of 12
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Bicriticality in Fe/sub x/Co/sub 1-x/Ta/sub 2/O/sub 6/
(2003) [Journal article]X-ray and neutron-diffraction, dc magnetic susceptibility, magnetization, and specific-heat measurements are reported for FexCo1 xTa2O6 mixed oxides. X-ray refinement indicates homogeneous samples for all the reported ... -
Effets de basse dimensionnalité et de la frustration magnétique dans les composés du type AB2O6
(2016) [Thesis]Cette tbese comprend une étude sur les composés AB2O6 qui ont attiré un large intérêt ces dernieres années grâce à leurs propriétés de magnétisme de basse dimensionalité. Pour mieux étudier les propriétes magnétiques et ... -
Electrical magnetotransport properties in RCo12B6 compounds (R = Y, Gd, and Ho)
(2020) [Journal article]Remarkable electronic transport and magnetotransport properties are found in the intermetallic compounds RCo12B6 (R=Y, Ho, and Gd). Detailed resistivity, magnetoresistance, and Hall effect measurements are reported in the ... -
Estudo do sistema quase unidimensional AxA'1-xNb2O6 (A e A'=Ni, Fe e Co) : preparação e caracterização das propriedades e estruturas magnéticas
(2011) [Thesis]Este trabalho é dedicado à investigação das propriedades estruturais e magnéticas destes compostos de estrutura ortorrômbica (A = metais magnéticos) ANb2O6 que chamaram nossa atenção como um sistema de Ising quase-1D. Esse ... -
Étude theórique et expérimentale des propriétés magnétiques des oxydes de métaux de transition quasi-bidimensionnels du type AB2O6
(2012) [Thesis]Este trabalho tem por objetivo contribuir para o estudo do magnetismo em óxidos isolantes do tipo AB2O6 (A = Fe, Co, Ni; B = Ta, Sb). Esses compostos cristalizam-se numa estrutura trirutilo e apresentam uma variedade muito ... -
Magnetic behavior of the NixFe1−xNb2O6 quasi-one-dimensional system : isolation of Ising chains by frustration
(2012) [Journal article]Physical properties of the NixFe1−xNb2O6 compounds are investigated combining x-ray and neutron powder diffraction with magnetic and calorimetry measurements as well as 57Fe Mössbauer spectroscopy. This system is known to ... -
A new approach for the determination of multiple cation locations and ordering, using the example of natural and heat-treated columbites
(2011) [Journal article]A new approach is proposed to determine unambiguously the location of four cations within the crystal structure of a natural AB2O6 columbite-type compound and derivatives, when submitted to order–disorder transitions caused ... -
New investigation of the magnetic structure of CoNb2O6 columbite
(2011) [Complete work published in event] -
Peculiarity of a magnetic structure in a quasi-one-dimensional columbite Co0.4Ni0.6Nb2O6
(2020) [Journal article]Quasi-one-dimensional (Q1D) spin chain systems have great potential applications in high-density information storage devices, quantum information and computers, because of their quantum magnetism properties. The low-dimensional ... -
Quasi-one-dimensional magnetic properties of NiNb2−xVxO6 compounds synthesized at high pressure in a nonstandard columbite-type structure
(2021) [Journal article]We report on the low-dimensional magnetic behavior of the series of compounds NiNb2−xVxO6 (0 x 2), with a columbite-type crystal structure stabilized at high pressure and temperature. Based on susceptibility, magnetization, ... -
Suppression of magnetic ordering in quasi-one-dimensional FexCo1−xNb2O6 compounds
(2011) [Journal article]We present a systematic investigation of the series of compounds FexCo1−xNb2O6 by means of x-ray and neutron powder diffraction combined with magnetic measurements, carried out in the paramagnetic as well as in the ordered ...
