Study of the Hg-In Liquid Alloy by Using the Piezothermal Method (1 bar &lt; P &lt; 3 kbar)

Gambino, M.; Rebouillon, P.; Bros, J.P.; Minassian, L. Ter

doi:10.1007/978-94-009-1027-0_10

Thermochemistry of Alloys 1989

DOI: 10.1007/978-94-009-1027-0_10

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Study of the Hg-In Liquid Alloy by Using the Piezothermal Method (1 bar < P < 3 kbar)

M. Gambino¹,

P. Rebouillon²,

J.P. Bros³

et al.

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“…The urea alkali metal salt systems have lower eutectic points from 28 to 116°C, 22 greater solubility of metal chloride, higher conductivity, and a wider electrochemical window. 23 The urea melt can also dissolve some metal oxides on the electrode surface and remove impurity water by itself.…”

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confidence: 99%

Induced Codeposition of Sm–Co Amorphous Films in Urea Melt and Their Magnetism

Liu

Yang

et al. 2006

J. Electrochem. Soc.

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The electroreduction of Co͑II͒ and Co͑II͒ + Sm͑III͒ in urea-acetamide-NaBr-MCl x melts were investigated by cyclic volatmmetry and chronoamperometry. The reduction of Co͑II͒ is an irreversible process. Sm͑III͒ cannot be reduced alone, but Sm-Co can be codeposited by induced deposition. The mechanism may involve a polynuclear complex containing Co͑II͒ and Sm͑III͒. An amorphous Sm-Co film comprised of nanoagglomerates has been synthesized. SEM shows that most of the agglomerates fall within a size range of 20-35 nm with a few agglomerates in the 50-90 nm range. The Sm content in the films varies from 7.9 to 79.16 wt % with the applied potential and the molar ratio of Sm͑III͒/Co͑II͒ in melt. The film could be crystallized by heattreatment at 900°C. Large crystal grains appeared after heat-treatment and their phase was confirmed as Sm 2 Co 17 . In addition, crystalline nanoparticles with the size of 10 nm were found on these large crystal grains. The magnetic properties of the Sm-Co films were determined using hysteresis loops, the coercive field H c of Sm ͑79.16 wt %͒-Co amorphous film is 2300 Oe at 5 K; and the remanent magnetization M R and the saturation magnetization M S are 0.536 and 1.429 emu g −1 , respectively.Rare earth ͑RE͒-transition metal ͑TM͒ alloys have excellent magnetic, optical, and electric properties and have been used to fabricate functional materials. Sm-Co alloys are widely used in permanent magnet applications because of their high-performance intrinsic magnetic properties such as very high Curie temperatures, high anisotropy fields, and relatively high saturation magnetizations. SmCo 5 alloy with the anisotropy larger than 10 8 erg cm −3 is expected to be a potential material for high-density recording media. 1 Permanent magnet materials based on Sm 2 Co 17 compound are the best candidates among all known materials for high-temperature applications. 2 Since the 1990s great progress has been made in the field of magnetic materials through the development of amorphous and nanocrystalline magnetic alloys, for example, the Finemet alloy and Nanoperm alloy which have proven to be excellent soft magnetic materials. 3,4 The amorphous RE-TM alloys, which are generally ferrimagnetic, have been intensively studied because of their potential practical applications. They can be used as magneto-optic recording media 5 because the crystallographic structure of amorphous alloys consists of a random array of atoms with very short-range correlations, leading to randomly distributed local anisotropy directions. 6 An amorphous phase may be used as a precursor to prepare a nanocrystalline structure upon crystallization. 7,8 When a certain amount of nanocrystalline phase is grown within the amorphous phase by annealing, the nanocomposite exhibits some peculiar characteristics which interest both materials scientists and engineers. 9,10 For instance, the exchange-spring magnet is prepared by the novel nanoassembly of known magnetic materials to create a composite with new and improved properties. They are based on...

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Induced Codeposition of Sm–Co Amorphous Films in Urea Melt and Their Magnetism

Liu

Yang

et al. 2006

J. Electrochem. Soc.

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“…We now consider the consistency of the renormalization conditions of Eqs. (17) beyond one-loop. First, we can show that the Eqs.…”

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confidence: 99%

“…The second condition of Eqs. (17) reduces this constraint to the case of no mixing at all orders. This is the crucial requirement.…”

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confidence: 99%

“…Similarly, the first condition of Eqs. (17), used in Eq. (20) at zero momenta, reduces it to the well-known constraint on the renormalization of the Yukawa coupling in the absence of mixing.…”

mentioning

confidence: 99%

“…Γ (1) χ iū η u ′ ; using them together with Eqs. (17) in the two-loop STI, the latter can be linearized and reduces to its one-loop form at p = 0. This is a nontrivial result, as the gauge dependence of the two-loop off-diagonal Σ (2) uu ′ (p) can now be written only in terms of two-loop Green functions.…”

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Fermion mixing renormalization and gauge invariance

1999

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We study the renormalization of the fermion mixing matrix in the Standard Model and derive the constraints that must be satisfied to respect gauge invariance to all orders. We demonstrate that the prescription based on the on-shell renormalization conditions is not consistent with the Ward-Takahashi Identities and leads to gauge dependent physical amplitudes. A simple scheme is proposed that satisfies all theoretical requirements and is very convenient for practical calculations.

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Study of the Hg-In Liquid Alloy by Using the Piezothermal Method (1 bar < P < 3 kbar)

Cited by 2 publications

References 8 publications

Induced Codeposition of Sm–Co Amorphous Films in Urea Melt and Their Magnetism

Induced Codeposition of Sm–Co Amorphous Films in Urea Melt and Their Magnetism

Fermion mixing renormalization and gauge invariance

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