Electrical and transport properties of nickel manganite obtained by Hall effect measurements

Savić, Stevan; Stojanović, Goran M.; Nikolić, Maria Vesna; Aleksić, O.S.; Golić, D. T. Luković; Nikolić, P.M.

doi:10.1007/s10854-008-9710-5

Cited by 7 publications

(3 citation statements)

References 27 publications

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“…Therefore, N rather than μ, should relate to the drop tendency of ρ 300 in Figure 7. Otherwise, despite the decreasing trend with x, high carrier mobility of up to 29.0 cm 2 /Vs would have been demonstrated for the films, as an order of magnitude greater than that of the nickel-manganite ceramics [37]. This may explain the high conduction in the thin film forms and, thus the faster output signals of the integrated thin film devices when compared with those of their bulk counterparts.…”

Section: Electrical Propertiesmentioning

confidence: 94%

Characterization of Cu-doped (Ni,Mn)₃O₄ thin films annealed at low temperatures

Cho

2020

Journal of Asian Ceramic Societies

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Negative-temperature coefficient of resistance (NTCR) thin films were prepared from (Ni 0.2 Mn 2.8-x Cu x )Cl 2 (0.010 ≤ x ≤ 0.040) solutions by liquid flow deposition (LFD) method. Influence of the Cu on the structural and electrical properties of the films annealed at °400°C was studied. It was found that the incorporation of copper (Cu) promoted an increase in both the crystallinity and grain size of the films. As Cu level increased, the absolute negative temperature coefficient of resistance (TCR) of the films was slightly decreased from 3.21% to 2.38%K −1 . On the other hand, the electrical resistivity (ρ) of the films significantly dropped with an increase of Cu, which was attributed to the improved carrier concentration rather than the enlarged grain size. The best electrical performance with ρ ~ 200 Ωcm was achieved in the film with x = 0.025 at room temperature. We provide the discussion on the conduction mechanism, particularly, for the high conduction behavior of the films via the changes of oxidation states of the manganese.

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Section: Electrical Propertiesmentioning

confidence: 94%

Characterization of Cu-doped (Ni,Mn)₃O₄ thin films annealed at low temperatures

Cho

2020

Journal of Asian Ceramic Societies

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“…Moreover our contribution to thick film thermistor layers includes not only substitution of basic oxides with other oxides but development of pastes based on thermistor nanopowders [56]. The sintered thermistors electronic properties were measured by FIR spectrometers [57,58], Hall effect measurement [59], electrical measurement (activation energy) [60] and photoacoustic spectroscopy (PA). The thermistor material thermal diffusivity was also determined for the first time by PA [61][62][63].…”

Section: Thick Film Thermistor Pastesmentioning

confidence: 99%

Recent advances in NTC thick film thermistor properties and applications

Aleksic

Nikolić

2017

FACTA U EE

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An introduction to thermal sensors and thermistor materials is given in brief. After that novel electrical components such as thick film thermistors and thermal sensors based on them are described: Custom designed NTC thermistor pastes based on nickel manganite NiM 2 O 4 micro/nanostructured powder were composed and new planar cellbased (segmented) constructions were printed on alumina. The thick film segmented thermistors were used in novel thermal sensors such as anemometers, water flow meters, gradient temperature sensor of the ground, and other applications. The advances achieved are the consequence of previous improvements of thermistor material based on nickel manganite and modified nickel manganite such as Cu 0.2 Ni 0.5 Zn 1.0 Mn 1.3 O 4 and optimization of thick film thermistor geometries for sensor applications. The thermistor powders where produced by a solid state reaction of MnCO 3 , NiO, CuO, ZnO powders mixed in proper weight ratio. After calcination the obtained thermistor materials were milled in planetary ball mils, agate mills and finally sieved by 400 mesh sieve. The powders were characterized by XRD and SEM. The new thick film pastes where composed of the powders achieved, an organic vehicle and glass frit. The pastes were printed on alumina, dried and sintered and characterized again by XRD, SEM and electrical measurements. Different thick film thermistor constructions such as rectangular, sandwich, interdigitated and segmented were printed of new thermistor pastes. Their properties such as electrical resistance of the thermistor samples where mutually compared. The electrode effect was measured for all mentioned constructions and surface resistance was determined. It was used for modeling and realizations of high, medium and low ohmic thermistors with different power dissipation and heat loss. Finally all the results obtained lead to thermal sensors based on heat loss for measuring the air flow, water flow, temperature gradient and heat transfer from the air to the ground.

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“…Materials for NTC thermistors are usually composed of transition metal spinel and are widely used in different industrial applications today [2][3][4][5]. Nickel manganite (NMO) material has been the subject of considerable practical interest as a potential candidate for NTC applications due to its interesting optical, electron transport, electronic and magnetic properties [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method

Savić

Stojanović

Vasiljević

et al. 2016

Ceramics International

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The chemical synthesis of nickel manganite powder was performed by a complex polymerization method (CPM). The obtained fine nanoscaled powders were uniaxially pressed and sintered at different temperatures: 1000-1200°C for 2 h, and different atmospheres: air and oxygen. The highest density was obtained for the sample sintered at 1200°C in oxygen atmosphere. The energy for direct band gap transition (Eg) calculated from the Tauc plot decreases from 1.51 to 1.40 eV with the increase of the sintering temperature. Indentation experiments were carried out using a three-sided pyramidal (Berkovich) diamond tip, and Young's modulus of elasticity and hardness of NTC (negative temperature coefficient) ceramics at various indentation depths were calculated. The highest hardness (0.754 GPa) and elastic modulus (16.888 GPa) are exhibited by the ceramics sintered at highest temperature in oxygen atmosphere.

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Electrical and transport properties of nickel manganite obtained by Hall effect measurements

Cited by 7 publications

References 27 publications

Characterization of Cu-doped (Ni,Mn)₃O₄ thin films annealed at low temperatures

Characterization of Cu-doped (Ni,Mn)₃O₄ thin films annealed at low temperatures

Recent advances in NTC thick film thermistor properties and applications

Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method

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Electrical and transport properties of nickel manganite obtained by Hall effect measurements

Cited by 7 publications

References 27 publications

Characterization of Cu-doped (Ni,Mn)3O4 thin films annealed at low temperatures

Characterization of Cu-doped (Ni,Mn)3O4 thin films annealed at low temperatures

Recent advances in NTC thick film thermistor properties and applications

Nanoindentation study of nickel manganite ceramics obtained by a complex polymerization method

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Characterization of Cu-doped (Ni,Mn)₃O₄ thin films annealed at low temperatures

Characterization of Cu-doped (Ni,Mn)₃O₄ thin films annealed at low temperatures