Temperature Dependent Magnetization and Remanent Magnetization in Pseudo-Binary ${\rm x}({\rm Fe}_{2}{\rm TiO}_{4})\hbox{-}(1-{\rm x})({\rm Fe}_{3}{\rm O}_{4})(0.30&lt;{\rm x}&lt;1.00)$ Titanomagnetites

Sanz, R.; Cerdán, Miguel Felipe; Wise, Adam; McHenry, Michael E.; Díaz-Michelena, Marina

doi:10.1109/tmag.2011.2157903

Cited by 14 publications

(5 citation statements)

References 16 publications

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“…The similarity between the temperature dependence of M sat (T ) and M rem (T ) can be observed in hard as well as soft ferromagnets. As an example of some ferromagnets where M rem (T )/M sat (T ) 0.1 and constant in the temperature region much below the Curie temperature, see [32].…”

Section: Temperature Dependence Of Magnetizationmentioning

confidence: 99%

Trace element content and magnetic properties of commercial HOPG samples studied by ion beam microscopy and SQUID magnetometry

et al. 2014

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In this study, the impurity concentration and magnetic response of nine highly oriented pyrolytic graphite (HOPG) samples with different grades and from different providers were determined using ion beam microscopy and SQUID magnetometry. Apart from sideface contaminations in the as-received state, bulk contamination of the samples in most cases consists of disk-shaped micron-sized particles made of Ti and V with an additional Fe contamination around the grain perimeter. The saturation magnetization typically increases with Fe concentration, however, there is no simple correlation between Fe content and magnetic moment. The saturation magnetization of one, respectively six, out of nine samples clearly exceeds the maximum contribution from pure Fe or Fe 3 C. For most samples the temperature dependence of the remanence decreases linearly with T -a dependence found previously for defectinduced magnetism (DIM) in HOPG. We conclude that apart from magnetic impurities, additional contribution to the ferromagnetic magnetization exists in pristine HOPG in agreement with previous studies. A comparative study between the results of ion beam microscopy and the commonly used EDX analysis shows clearly that EDX is not a reliable method for quantitative trace elemental analysis in graphite, clarifying weaknesses and discrepancies in the element concentrations given in the recent literature.

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Section: Temperature Dependence Of Magnetizationmentioning

confidence: 99%

Trace element content and magnetic properties of commercial HOPG samples studied by ion beam microscopy and SQUID magnetometry

et al. 2014

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“…If composition of is nonequilibrium, transition to equilibrium state can lead to decay into phases enriched and depleted in titanium. Spinodal decomposition in the system of titanomagnetites, resulting in enhancement of magnetic properties can explain features of remanent magnetization of Mars' rocks [1,2]. Artificial titanomagnetites are widely used in studies of chemical and physical characteristics of synthesized nano-and micromaterials.…”

Section: Titanomagnetites (mentioning

confidence: 99%

Dependence of Relaxation Time on the Core Size Two-Phase Nanoparticles Magnetite/Titanomagnetite

Iliushin¹,

Afremov²,

Anisimov³

2015

AMM

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In this paper, depending of the blocking temperature on magnetite core size for core/shell nanoparticles has been carried out using our theoretical model. Nanoparticles has size of 100nm, and magnetite core increases from 0nm to 100nm. Systems were studied with different values of exchange constant. The data obtained indicate that exchange constant increases the blocking temperature. However, the sign of the constant does not matter.

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“…One of the targeted measurements of MOURA instrument will be to measure the change in remanent magnetization of Mars lithospheric minerals. We will measure the thermoremanent behaviour of surface rocks and search for temperature transitions for the compositional analysis of the crust (Sanz et al, 2011;Fernández et al, 2013) aiming to explain its local magnetic anomalies, with intensities several orders of magnitude higher than the Earth ones. The second scientific objective is to measure the variations of the field related to the solar wind effects.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the limited development time (2 years), mass and energy constraints of the mission (150 g and > 0.5 W for the three Spanish payloads), and the Martian environment envelope (temperatures ranging from −90 to 20 • C in operation and from −120 to 125 • C storage, and a total irradiation dose up to 15 krad Si −1 ), MOURA development has singular characteristics, which have an impact on its performances. MOURA consists of a double design: one compact sensor with macroscopic front-end electronics including many COTS and PEMS components up-screened for the mission, and a second with a mixed applied specific integrated circuit (ASIC) based front-end (Sordo-Ibáñez et al, 2014). This work focuses on the former one.…”

Section: Introductionmentioning

confidence: 99%

“…Under the mentioned demanding criteria, the selected sensing element was the triaxial HMC1043 magnetic sensor by Honeywell (Honeywell Magnetic Sensors, 2014). The HMC1043 sensors belong to a family of sensors based on anisotropic magnetoresistance (AMR) effect (Freitas et al, 2007) which has been exhaus-tively up-screened (temperature, thermal shock, life cycle, and radiation) by INTA (Sanz et al, 2012) and successfully used in previous space missions (D. Michelena et al, 2010;D. Michelena, 2009;DTUsat, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Calibration of QM-MOURA three-axis magnetometer and gradiometer

Díaz-Michelena¹,

Sanz²,

Cerdán³

2014

Preprint

Self Cite

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Abstract. The MOURA instrument is a three axes magnetometer and gradiometer equipped with an inclinometer designed and developed for Mars MetNet Precursor mission. The qualification model (MOURA QM) is devoted to magnetic surveys on Earth with the aim to achieve some experience prior to the arrival to Mars. In this work it is presented a practical first approach for the calibration of the instrument for these preliminary field campaigns on Earth. Other works will describe the design, up-screening and qualification and full capabilities of the instrument in depth, giving some feedback on the development.

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Temperature Dependent Magnetization and Remanent Magnetization in Pseudo-Binary ${\rm x}({\rm Fe}_{2}{\rm TiO}_{4})\hbox{-}(1-{\rm x})({\rm Fe}_{3}{\rm O}_{4})(0.30<{\rm x}<1.00)$ Titanomagnetites

Cited by 14 publications

References 16 publications

Trace element content and magnetic properties of commercial HOPG samples studied by ion beam microscopy and SQUID magnetometry

Trace element content and magnetic properties of commercial HOPG samples studied by ion beam microscopy and SQUID magnetometry

Dependence of Relaxation Time on the Core Size Two-Phase Nanoparticles Magnetite/Titanomagnetite

Calibration of QM-MOURA three-axis magnetometer and gradiometer

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