Phase relationships and structural, magnetic, and thermodynamic properties of alloys in the pseudobinary<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Er</mml:mi><mml:mn>5</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Si</mml:mi><mml:mn>4</mml:mn></mml:msub><mml:mtext>−</mml:mtext><mml:msub><mml:mi mathvariant="normal">Er</mml:mi><mml:mn>5</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">Ge</mml:mi><mml:mn>4</m

Pecharsky, A. O.; Gschneidner, K.A.; Pecharsky, V. K.; Schlagel, Deborah L.; Lograsso, Thomas A.

doi:10.1103/physrevb.70.144419

Cited by 50 publications

(35 citation statements)

References 39 publications

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“…Recent studies have shown that a high magnetic field induces a structural transformation to the orthorhombic phase giving rise to the O (I)-FM phase at low temperatures (H > 80 kOe at T = 5 K) 13,14 . On the other hand, hydrostatic pressure not only induces the O (I) phase at low temperature, but also shifts the high-temperature crystallographic change at a very high rate of dT t /dP ∼ -30 K/kbar 15 .…”

Section: Introductionmentioning

confidence: 99%

Magnetism and magnetocaloric effect of single-crystal Er5Si4under pressure

Marcano¹,

Algarabel²,

Fernández³

et al. 2012

Phys. Rev. B

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Magnetic and magnetocaloric properties of single crystalline Er5Si4 have been investigated as a function of the applied magnetic field (up to 50 kOe) and the hydrostatic pressure (up to 10 kbar) in the 5-300 K temperature range along the three main crystallographic directions. The magnetization isotherms show a highly anisotropic behaviour with the easy-magnetization direction along the b-axis for the low-pressure monoclinic and high-pressure orthorhombic structures, in good agreement with previous neutron scattering experiments. Below T C the approach to the saturation shows a step-like behaviour when the magnetic field is applied along the hard directions. The steps are sharper as the pressure increases. At constant magnetic field change, increasing the pressure induces a highly anisotropic enhancement of the magnetic entropy change. An enhancement of 20 % is observed along the easy axis b, where the magnetic entropy change is maximum. The different evolution of the magnitude and temperature dependence of the magnetocaloric effect (MCE) along the three crystallographic directions with pressure is discussed.

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Section: Introductionmentioning

confidence: 99%

Magnetism and magnetocaloric effect of single-crystal Er5Si4under pressure

Marcano¹,

Algarabel²,

Fernández³

et al. 2012

Phys. Rev. B

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“…thermal and/or mechanical treatment). Surprisingly, the high temperature M-PM to O-I-PM transition also shows weak magnetostructural coupling as noted in the heat capacity 30 and single crystal magnetization measurements (Fig. 4).…”

Section: Discussionmentioning

confidence: 99%

“…The high-temperature (or room-temperature) 18,19,30 At the same time there is a substantial interaction between the crystal and magnetic sublattices in this compound, 27 and applied magnetic field increases net magnetic moment in this compound through the modification of its crystal structure below 30 K when the ground state is essentially the same.…”

Section: Discussionmentioning

confidence: 99%

“…25,30 The first-order structural only transformation manifests as a broad peak on the heat capacity data. 30 Surprisingly, the transformation at 200 K in the polycrystalline sample weakly depends on the applied magnetic field (H = 40 kOe and higher), despite of the paramagnetism of both phases which are involved in the transition. 30,31 5…”

Section: Introductionmentioning

confidence: 99%

“…Recent experimental results obtained at various pressures, temperatures, and applied magnetic fields 18,19,[25][26][27][28][29][30] showed that in Er 5 Si 4 the orthorhombic (O-I) ↔ monoclinic (M) structural transition takes place at about T s = 200 K on cooling, and contrary to most of the R 5 T 4 systems, where structural and magnetic transitions are either concomitant or close to one another on the temperature scale, 6 the magnetic ordering transition occurs here at a much lower temperature (T order. = 30 K).…”

Section: Introductionmentioning

confidence: 99%

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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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