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

TitleMagnetism and magnetocaloric effect of single-crystal Er(5)Si(4) under pressure
Publication TypeJournal Article
Year of Publication2012
AuthorsMarcano N, Algarabel PA, Fernandez JR, Magen C, Morellon L, Singh NK, Schlagel DL, Gschneidner KA, Pecharsky VK, Ibarra MR
Journal TitlePhysical Review B
Volume85
Pages024408
Date Published01
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberWOS:000298985900004
Keywordsgd-5(si2ge2), gd-5(sixge1-x)(4), phase-transitions
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.

URL<Go to ISI>://WOS:000298985900004
DOI10.1103/PhysRevB.85.024408
Alternate JournalPhys. Rev. B