Year: 2012
Type: article
Abstract: Magnetic and magnetocaloric properties of single-crystalline Er${}_{5}$Si${}_{4}$ 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 $b$ axis for the low-pressure monoclinic and high-pressure orthorhombic structures, in good agreement with previous neutron scattering experiments. Below $T$${}_{C}$, the approach to the saturation shows a steplike behavior when the magnetic field is applied along the hard directions. The steps are sharper as the pressure increases. At constant magnetic field change, increasing the pressure induces a highly anisotropic enhancement of the magnetic entropy change. An enhancement of 20$%$ is observed along the easy axis $b$, 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.
Source: Physical Review B
Institutions: Consejo Superior de Investigaciones Científicas, Universidad de Zaragoza, Centro Universitario de la Defensa Zaragoza, Universidad de Cantabria, Fundacion Agencia Aragonesa para la Investigacion y el Desarrollo, Instituto de Nanociencia y Materiales de Aragón, United States Department of Energy, Iowa State University, Ames National Laboratory
Language: Latvian
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2016387129