Magnetism and magnetocaloric effect of single-crystal Er 5Si 4 under pressure

Marcano, N. ; Algarabel, P. A. (Universidad de Zaragoza) ; Fernández, J. R. ; Magén, C. (Universidad de Zaragoza) ; Morellón, L. (Universidad de Zaragoza) ; Singh, N. K. ; Schlagel, D. L. ; Gschneidner, K. A. ; Pecharsky, V. K. ; Ibarra, M. R. (Universidad de Zaragoza)

Resumen: 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 behavior with the easy-magnetization direction along the axis for the low-pressure monoclinic and high-pressure orthorhombic structures, in good agreement with previous neutron scattering experiments. Below , the approach to the saturation shows a steplike behavior 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 , where the magnetic entropy change is maximum. The different evolution of the magnitude and temperature dependence of the magnetocaloric effect along the three crystallographic directions with pressure is discussed.

Idioma: Inglés

DOI: 10.1103/PhysRevB.85.024408

Año: 2012

Publicado en: Physical review. B, Condensed matter and materials physics 85, 2 (2012), 024408-9
ISSN: 1098-0121

Factor impacto JCR: 3.767 (2012)

Categ. JCR: PHYSICS, CONDENSED MATTER rank: 15 / 68 = 0.221 (2012) - Q1 - T1

Financiación: info:eu-repo/grantAgreement/ES/DGA/E26
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2008-06567-C02

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)