The standard enthalpies of formation of binary intermetallic compounds of some late 4d and 5d transition metals by high temperature direct synthesis calorimetry

Meschel, S.V.; Nash, Philip; Chen, Xing-Qiu

doi:10.1016/j.jallcom.2009.11.092

Cited by 41 publications

(18 citation statements)

References 49 publications

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“…Especially, Miedema's model [15] has been used to calculate the standard formation enthalpies of intermetallics [16,17] and liquid alloys [18], to predict phase-diagram thermodynamics [19,20], phase stability of mechanical alloying [21,22], glass forming abilities [23][24][25][26], and even interfacial behaviors [27]. In some earlier studies [24][25][26], glass forming ranges of ternary alloys have been calculated by comparing the formation enthalpies between amorphous and crystalline states using Miedema's model, and some interesting results have been obtained.…”

Section: Introductionmentioning

confidence: 99%

Calculation of glass forming ranges in Al–Ni–RE (Ce, La, Y) ternary alloys and their sub-binaries based on Miedema's model

Sun

Liu

et al. 2010

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Calculation of glass forming ranges in Al–Ni–RE (Ce, La, Y) ternary alloys and their sub-binaries based on Miedema's model

Sun

Liu

et al. 2010

Journal of Alloys and Compounds

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“…To date research on the SHE from AFs has utilized the implicit assumption that there is no interfacial spin flip scattering or "spin memory loss" (SML) [18] when the spin current traverses the interface to apply a torque to the FM. However the existence of a large SML at some Pt/FM interfaces, together with the negative enthalpy of formation of Mn with both Fe and Ni [19] that can promote interface intermixing, raises the question whether there may also be a significant SML at PtMn/FM interfaces, which would mean that the internal…”

mentioning

confidence: 99%

Strong spin Hall effect in the antiferromagnet PtMn

Shi

Ralph

et al. 2016

Phys. Rev. B

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Effectively manipulating magnetism in ferromagnet (FM) thin film nanostructures with an inplane current has become feasible since the determination of a "giant" spin Hall effect (SHE) in certain heavy metal (HM)/FM system. Recently, both theoretical and experimental reports indicate that the non-collinear and collinear metallic antiferromagnet (AF) materials can have both a large anomalous Hall effect (AHE) and a strong SHE. Here we report a systematic study of the SHE in PtMn with several PtMn/FM systems. By using interface engineering to reduce the "spin memory loss" we obtain, in the best instance, a spin torque efficiency , where T int is the effective interface spin transparency. This is more than twice the previously reported spin torque efficiency for PtMn. We also find that the apparent spin diffusion length in PtMn is surprisingly long, PtMn s 2.3nm   . 2 SHE in different heavy metal (HM)/ferromagnet (FM) systems 1-4 can be characterized by the spin Hall ratio (angle)where J s is the transverse spin current density generated in the HM and J e is the applied longitudinal electrical current density. Recently a new class of heavy metal (HM) alloys, the non-collinear antiferromagnet (AF), Mn 3 Ir 5-7 and Cu-Au-I type AF, X 50 Mn 50 (X=Fe, Pd, Ir, and Pt) [8][9][10][11] have been reported to exhibit SHE as spin current sources, with an internal PtMn 0.125for PtMn 10 , opening up a new area in the rapidly advancing field of "antiferromagnet spintronics" [12][13][14][15][16][17] . To date research on the SHE from AFs has utilized the implicit assumption that there is no interfacial spin flip scattering or "spin memory loss" (SML) 18 when the spin current traverses the interface to apply a torque to the FM. However the existence of a large SML at some Pt/FM interfaces, together with the negative enthalpy of formation of Mn with both Fe and Ni 19 that can promote interface intermixing, raises the question whether there may also be a significant SML at PtMn/FM interfaces, which would mean that the internal q SH PtMn within PtMn could actually be much higher than previously reported.We performed a systematic study of the SHE in several PtMn/FM systems employing spin-torque ferromagnetic resonance (ST-FMR) 20 on in-plane magnetized (IPM) FM layers and the harmonic response technique (HR) 21,22 on FM layers with perpendicular magnetic anisotropy (PMA). We also studied samples where a thin (0.25 nm -0.8 nm) Hf layer is inserted between the PtMn and the FM to suppress strong SML at the interface 23 . We find DL  to vary significantly with both the deposition order for a given PtMn/FM system and between the different FM systems, but to be relatively consistent between IPM and PMA samples with the same constituents. We also obtained robust current-induced switching in these PMA samples demonstrating the potential for utilizing PtMn in perpendicular magnetic tunneling junction (p-MTJ) and three-terminal device applications.

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“…Due to limited experimental data of the compounds, the DH 298°a nd S 298°o f compounds were mostly estimated by considering systematic trend. As for the DH 298°o f all Mn-RE compounds, the predicted values from the modified Miedema model are compared with those [63] obtained in the present optimization and calorimetric data (this work and [62,63] ) in Table 9. In the present optimization, the DH 298°o f all the compounds were evaluated by the combination of the experimental data and the predicted values.…”

Section: Systematic Analysismentioning

confidence: 99%

Critical Systematic Evaluation and Thermodynamic Optimization of the Mn-RE System (RE = Tb, Dy, Ho, Er, Tm and Lu) with Key Experiments for the Mn-Dy System

Kim

Paliwal

Zhou

et al. 2014

J. Phase Equilib. Diffus.

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Critical evaluation and optimization of all available phase diagrams and thermodynamic data for the Mn-RE (RE = Tb, Dy, Ho, Er, Tm, and Lu) systems has been conducted to obtain reliable thermodynamic functions of all the phases in the systems. Key experiments for the Mn-Dy system were performed using DSC and solution calorimeter. In the thermodynamic modeling, it is found that the Mn-RE systems show systematic changes in the phase diagrams and thermodynamic properties such as enthalpy of mixing in liquid state in the order of periodic number in the lanthanide series. The systematic thermodynamic modeling approach for RE elements allow to resolve inconsistencies in the experimental data and estimate unknown thermodynamic properties and phase equilibria of Mn-RE system.

show abstract

The standard enthalpies of formation of binary intermetallic compounds of some late 4d and 5d transition metals by high temperature direct synthesis calorimetry

Cited by 41 publications

References 49 publications

Calculation of glass forming ranges in Al–Ni–RE (Ce, La, Y) ternary alloys and their sub-binaries based on Miedema's model

Calculation of glass forming ranges in Al–Ni–RE (Ce, La, Y) ternary alloys and their sub-binaries based on Miedema's model

Strong spin Hall effect in the antiferromagnet PtMn

Critical Systematic Evaluation and Thermodynamic Optimization of the Mn-RE System (RE = Tb, Dy, Ho, Er, Tm and Lu) with Key Experiments for the Mn-Dy System

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