Phase diagram of the binary erbium-silicon system and physical properties of erbium silicides up to 1050°C

Luzan, S. P.; Listovnichii, V.E.; Buyanov, Yu. I.; Martsenyuk, P. S.

doi:10.1016/0925-8388(95)01977-4

Cited by 28 publications

(12 citation statements)

References 13 publications

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“…Considering the full occupancy of all sites, 31 we conclude that Er 5 Si 4 is a stoichiometric compound, and despite small weight losses observed during the arc melting, the evaporation of the Er metal was substantial enough to shift the as-prepared Er 5 Si 4 alloy into the ErSi 1−x +Er 5 Si 4 twophase region of the Er-Si phase diagram. 29 Consistent with this conclusion, is the x-ray powder diffraction pattern (not shown) of the stoichiometric Er 5 Si 4 prepared using the Bridgman technique, from now on called sample III, indicating a single phase alloy because evaporative losses from a sealed crucible were indeed negligible. Its unit cell dimensions (Table I) deviate from those of both arc-melted materials by no more than two standard deviations, i.e., the differences in the unit cell dimensions of the three different Er 5 Si 4 samples, are statistically insignificant.…”

Section: Alloy Preparation and Characterizationsupporting

confidence: 64%

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4
Pecharsky
¹
,
Gschneidner
²
,
Pecharsky
³

et al. 2004
Phys. Rev. B
50
3
30
1
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Section: Alloy Preparation and Characterizationsupporting

confidence: 64%

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4
Pecharsky
¹
,
Gschneidner
²
,
Pecharsky
³

et al. 2004
Phys. Rev. B
50
3
30
1
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“…In the Gd 5 Si 4 -type structure, which is the room-temperature polymorph for the Er 5 Si 4 , the partially covalent T -T bonds exist between all of the slabs, while in the Gd 5 Si 2 Ge 2 -type structure (M), 24 which is the low-temperature form of Er 5 Si 4 , 18,19 one half of these bonds are much longer, and therefore, weaker. The lattice is monoclinically distorted, and microscopic twinning has been observed in Er 5 Si 4 single crystal. 19 For a phase to adopt the Sm 5 Ge 4 -type of structure (O-II), all of the interslab T -T bonds must be broken, 24 which was not observed in Er 5 Si 4 .…”

Section: Introductionmentioning

confidence: 97%

“…The lattice is monoclinically distorted, and microscopic twinning has been observed in Er 5 Si 4 single crystal. 19 For a phase to adopt the Sm 5 Ge 4 -type of structure (O-II), all of the interslab T -T bonds must be broken, 24 which was not observed in Er 5 Si 4 .…”

Section: Introductionmentioning

confidence: 97%

Magnetic and structural properties of single-crystalline Er5Si4

et al. 2012

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The magnetization of the oriented Er 5 Si 4 single crystal, measured along the three principal crystallographic directions reveals strong magnetocrystalline anisotropy. The b-axis is the easy magnetization direction. The possible presence of the crystal field effect and the non-collinear alignment of magnetic moments result in a lower than gJ magnetization along all crystallographic directions even in70 kOe applied magnetic field, with the lowest moment (4.22 μ B /Er 3+ ) recorded along the a axis. The magnetization measurements show that even in the true paramagnetic state there is a weak magnetic field dependence of the structural-only transition when the field is applied along the a and c axes but this transition is magnetic field independent along the b-axis in fields of 70 kOe or less. The temperature and magnetic field dependent x-ray powder diffraction study of the powdered single crystal confirms the temperature driven structural orthorhombic -monoclinic transition in the paramagnetic state and the low temperature magnetic field driven monoclinic -orthorhombic transition in the magnetically ordered state. The x-ray powder diffraction indicates that the high temperature transition is magnetic field 2 independent below 40 kOe in a polycrystalline sample while the low temperature transition requires high magnetic field for its completion.

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“…According to the phase diagram published in 1996, 16 in the Er-Si system 5:3 and 5:4 phases exist as adjacent line compounds (Fig. 5).…”

Section: B Composition Effectsmentioning

confidence: 99%

Persistence of 5:3 plates in RE₅(Si_xGe_1-x)₄ alloys

2006

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Studies of RE 5 (Si x Ge 1-x ) 4 alloys, where RE equals rare earth, have revealed a second-phase having a thin-plate morphology in essentially every alloy examined, independent of exact composition and matrix crystal structure. Identified as having a composition approximating Gd 5 (Si x Ge 1-x ) 3 and a hexagonal crystal structure in the Gd-based system, it has been suggested that the observed thin-plate second phases seen in this family of rare earth alloys are all most likely of the form RE 5 (Si x Ge 1-x ) 3 . A number of interesting observations suggest that the formation of these second-phase plates is somewhat unusual. The purpose of this article is to investigate the stability of this second phase in Gd-and Er-based compounds. The stability was investigated as a function of thermal cycling and large-scale composition fluctuations. The results of scanning and transmission electron microscopy (SEM, TEM) studies indicate that the RE 5 (Si x Ge 1-x ) 3 phase is extremely stable once it forms in a RE 5 (Si x Ge 1-x ) 4 matrix. Studies of RE 5 (Si x Ge 1-x ) 4 alloys, where RE equals rare earth, have revealed a second-phase having a thin-plate morphology in essentially every alloy examined, independent of exact composition and matrix crystal structure. Identified as having a composition approximating Gd 5 (Si x Ge 1-x ) 3 and a hexagonal crystal structure in the Gd-based system, it has been suggested that the observed thin-plate second phases seen in this family of rare earth alloys are all most likely of the form RE 5 (Si x Ge 1-x ) 3 . A number of interesting observations suggest that the formation of these second-phase plates is somewhat unusual. The purpose of this article is to investigate the stability of this second phase in Gd-and Er-based compounds. The stability was investigated as a function of thermal cycling and large-scale composition fluctuations. The results of scanning and transmission electron microscopy (SEM, TEM) studies indicate that the RE 5 (Si x Ge 1-x ) 3 phase is extremely stable once it forms in a RE 5 (Si x Ge 1-x ) 4 matrix.

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Phase diagram of the binary erbium-silicon system and physical properties of erbium silicides up to 1050°C

Cited by 28 publications

References 13 publications

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4
Pecharsky
¹
,
Gschneidner
²
,
Pecharsky
³

et al. 2004
Phys. Rev. B
50
3
30
1
View full text Add to dashboard Cite

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4
Pecharsky
¹
,
Gschneidner
²
,
Pecharsky
³

et al. 2004
Phys. Rev. B
50
3
30
1
View full text Add to dashboard Cite

Magnetic and structural properties of single-crystalline Er5Si4

Persistence of 5:3 plates in RE₅(Si_xGe_1-x)₄ alloys

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Phase diagram of the binary erbium-silicon system and physical properties of erbium silicides up to 1050°C

Cited by 28 publications

References 13 publications

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4Pecharsky1, Gschneidner2, Pecharsky3 et al. 2004Phys. Rev. B503301View full textAdd to dashboardCite

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4Pecharsky1, Gschneidner2, Pecharsky3 et al. 2004Phys. Rev. B503301View full textAdd to dashboardCite

Magnetic and structural properties of single-crystalline Er5Si4

Persistence of 5:3 plates in RE5(SixGe1-x)4 alloys

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About

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4
Pecharsky
¹
,
Gschneidner
²
,
Pecharsky
³

et al. 2004
Phys. Rev. B
50
3
30
1
View full text Add to dashboard Cite

Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinaryEr5Si4−Er5Ge4
Pecharsky
¹
,
Gschneidner
²
,
Pecharsky
³

et al. 2004
Phys. Rev. B
50
3
30
1
View full text Add to dashboard Cite

Persistence of 5:3 plates in RE₅(Si_xGe_1-x)₄ alloys