Effects of alloying additions on the γ ⇋ α transformation of cerium—Part I. Pure cerium

Gschneidner, K.A.; Elliott, R.O.; McDonald, Robert

doi:10.1016/0022-3697(62)90513-9

Cited by 128 publications

(25 citation statements)

References 19 publications

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“…Investigations into the phase diagram and properties of cerium in the high-pressure region were pursued under static [1][2][3][4][5][6][7][8][9][10][11][12] and dynamic [13][14][15] compression conditions. In this paper the dynamic compression of Ce is considered with the use of a thermodynamically complete two-phase equation of state (EOS) for the γ-and α-phases.…”

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confidence: 99%

Two-Phase (γ,α) Equation of State for Cerium and Features of its Dynamic Compression

Yelkin¹,

Козлов²,

Kakshina³

et al. 2006

AIP Conference Proceedings

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The unusual thermodynamic properties of cerium result from features in the narrow 4f-zone whose electrons are subdivided into localized and delocalized subsystems. In this paper the model of pseudo-binary solid solutions allowing for two different electronic states is applied to construct the thermodynamically complete two-phase equation of state for cerium. The parameters of the model were fitted to describe the thermodynamic data obtained in the static experiments with high-purity cerium. This equation of state was used to analyze wave structures realized under dynamic compression with regard to the equilibrium (γ,α) phase transition.Cerium possesses a great variety of unusual properties among which are the presence of a critical point on the line of the isomorphic (γ-α)-transition and also the anomalous behavior of elastic and thermal properties in its neighborhood. Furthermore, the phase diagram of cerium, which contains a great number of phases, is characterized by considerable complexity and inconsistency.Investigations into the phase diagram and properties of cerium in the high-pressure region were pursued under static [1-12] and dynamic [13][14][15] compression conditions. In this paper the dynamic compression of Ce is considered with the use of a thermodynamically complete two-phase equation of state (EOS) for the γ-and α-phases. As the basis for the formulation of the equation of state, the model of pseudobinary solid solutions, developed by Aptekar and Ponyatovsky [16], is applied for the description of anomalous behavior of Ce in the neighborhood of the (γ-α)-transformation. In the model, cerium is presented as a solid substitution solution composed of Ce atoms in various electronic states. According to present views, a difference in the electronic states of the α-and γ-phases is in various screening levels of spins of localized 4f electrons (Kondo volume-collapse model), or in localization (γ-phase) and delocalization (α-phase) of 4f electrons (Mott transition). But for the semi-empirical model, the refinement of electronic states is of little significance; their energy closeness is a decisive factor.The specific (per mole) thermodynamic Gibbs potential for the mixture of two kinds of cerium atoms being in sites of the fcc lattice is written in the form [16], G

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confidence: 99%

Two-Phase (γ,α) Equation of State for Cerium and Features of its Dynamic Compression

Yelkin¹,

Козлов²,

Kakshina³

et al. 2006

AIP Conference Proceedings

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“…), ␤ (dhcp) and ␥ (f.c.c.) phases [1]. At room temperature and ambient pressure, ␥-Ce is stable having a local magnetic moment of 2.52 B .…”

Section: Introductionmentioning

confidence: 96%

Pressure-enhanced magnetoresistance of -Ce single crystal

Miyagawa

Oomi

Ohashi

et al. 2006

Journal of Alloys and Compounds

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“…The first-order valence transition is known as c-a transition in Ce metal [7]. The transition temperature in Ce 0:8 La 0:1 Th 0:1 decreases with increasing magnetic field, and the QCP occurs at around 56 T [8].…”

Section: Introductionmentioning

confidence: 99%

Valence fluctuations in an extended periodic anderson model under a magnetic field

Sugibayashi

Tsuruta

Miyake

2010

Physica C: Superconductivity and its Applications

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Effects of alloying additions on the γ ⇋ α transformation of cerium—Part I. Pure cerium

Cited by 128 publications

References 19 publications

Two-Phase (γ,α) Equation of State for Cerium and Features of its Dynamic Compression

Two-Phase (γ,α) Equation of State for Cerium and Features of its Dynamic Compression

Pressure-enhanced magnetoresistance of -Ce single crystal

Valence fluctuations in an extended periodic anderson model under a magnetic field

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