Anomalous electrical resistivity in the region of compensation temperature in ferrites NiFe1.26V0.74·O4

Belov, K. P.; Goriaga, A.N.; Волкова, Н. В.

doi:10.1016/0038-1098(65)90237-1

Cited by 4 publications

(4 citation statements)

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“…Theoretical methods of describing this effect will be discussed in the next section. The pseudocritical behaviour is also sensitively reflected in the Arrott plot (Belov andGoriaga 1956, Arrott 1957). Two types of Arrott plot curves have been observed, as shown in figure 40.…”

Section: -I T -T I -~ ( T > T)mentioning

confidence: 99%

Magnetic amorphous alloys: physics and technological applications

Egami

1984

Rep. Prog. Phys.

224

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Magnetic amorphous alloys obtained by rapid quenching of the melt are excellent soft magnetic materials with a wide range of technological applications. They also represent a significant challenge to the scientific understanding of magnetic materials, since most of the existing theories of solids assume lattice periodicity. For these reasons, the magnetic and other properties of amorphous alloys have been very actively studied over the last decade. In recent years increasing attention has been directed to the fundamental understanding of the structural, thermal and magnetic properties of the amorphous alloys. It is not only scientifically but also technologically important to achieve such an understanding, since the amorphous alloys are, in many respects, so different from conventional crystalline magnetic materials. In this review, we attempt to summarise recent progress in research on magnetic amorphous alloys and critically assess the present level of understanding of this new class of magnetic materials, focusing mostly on the transition-metal-metalloid glasses. We start with a review of early developments and a discussion on the nature of glasses and glass formation and proceed to an extensive discussion of their atomic structure, both from the experimental and theoretical points of view. The questions of glass formation, stability and relaxation are then addressed, followed by a review of their non-magnetic properties. The review of magnetic properties starts with a discussion of the magnetic moment, with the emphasis on the relation between electronic structure and magnetic behaviour. The magnetic interaction, local magnetic anisotropy and magnetoelastic effects are then considered, followed by discussions on magnetic excitation and phase transition, magnetic anisotropy and coercivity, and the effect of structural relaxation. Finally we discuss the prospects of technological applications and the manner in which the basic understanding of these properties could benefit such applications.

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Section: -I T -T I -~ ( T > T)mentioning

confidence: 99%

Magnetic amorphous alloys: physics and technological applications

Egami

1984

Rep. Prog. Phys.

224

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“…1 as the sample temperature is increased. The Belov-Goriaga-Arrott plot [5] near the Curie temperature 6t gives 6f = 626 K. Further heating to 1000 K reveals that crystallization takes place at Tcr = 683 K, detected by the increase of O(H = 9 kOe} at this temperature (Fig. I).…”

Section: Resultsmentioning

confidence: 89%

A high permeability Fe-Ni base glassy alloy containing Mo

Hasegawa¹,

Narasimhan²,

DeCristofaro³

1978

Journal of Applied Physics

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This paper reports some of the low field magnetic properties, and their stability, obtained for a glassy Fe40Ni38M04B18 (METGLAS@ Alloy #2826MB) alloy, which has a Curie temperature of 626 K, room temperature saturation induction of 8.8 kG and a linear magnetostriction of about 9 ppm. When optimally fieldannealed, the toroidally wound material shows a coercivity of about 7 mOe, remanence of 7.5 kG and a dc permeability (at B = 100 G) of about 45,000. The material's ac core loss at B = 1 kG and f = 10 4 Hz is close to that (~1.3 watts/kg) of a tape-wound crystalline 4-79 Mo Permalloy core of similar size. The high frequency effective permeability is ~700 at f = 5 x 105 Hz. This is a factor of ~7 greater than for 4-79 Permalloy. The thermal stability of these properties is found to be excellent. The improved thermal and magnetic properties of the present material over Fe-Ni-P-B glassy alloys significantly enhance the opportunity to apply these materials in various magnetic applications.

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“…Abnormal heat capacitytemperature dependence C(T ) is shown in Figure 2. By adding the second component, the excessive heat capacity decreases (Figure 2) and this is probably due to lower concentration of ions (cobalt, iron) whose transitions between levels result in appearance of this heat capacity component, and to lattice parameters distortion by occurrence of three coexisting phases (structures) [15,18,19]. Analysis of the excessive heat capacity-temperature dependence C makes it possible to interpret it as a Schottky abnormality for three-level states.…”

Section: Findings and Discussionmentioning

confidence: 99%

Heat capacity of CoFe-=SUB=-2-=/SUB=-O-=SUB=-4-=/SUB=- and 0.3CoFe-=SUB=-2-=/SUB=-O-=SUB=-4-=/SUB=--0.7PbTiO-=SUB=-3-=/SUB=- composite

R.G.

Kallaev

Omarov

et al. 2023

Physics of the Solid State

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The temperature dependence of the heat capacity of the CoFe2O4 ferromagnet and the 0.3CoFe2O4-0.7PbTiO3 multiferroic composite in the temperature range 150-820 K has been studied. heat capacity over a wide temperature range. It is noted that the additional component of the heat capacity is due to the transition of cobalt or iron ions to higher energy levels, as well as due to the distortion of the lattice parameters due to the appearance of three coexisting phases. Keywords: heat capacity, multiferroic composite, Schottky effect.

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Anomalous electrical resistivity in the region of compensation temperature in ferrites NiFe1.26V0.74·O4

Cited by 4 publications

References 0 publications

Magnetic amorphous alloys: physics and technological applications

Magnetic amorphous alloys: physics and technological applications

A high permeability Fe-Ni base glassy alloy containing Mo

Heat capacity of CoFe-=SUB=-2-=/SUB=-O-=SUB=-4-=/SUB=- and 0.3CoFe-=SUB=-2-=/SUB=-O-=SUB=-4-=/SUB=--0.7PbTiO-=SUB=-3-=/SUB=- composite

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