title: Anomalous Schottky specific heat and structural distortion in ferromagnetic PrAl2.
abstract: Unique from other rare earth dialuminides, PrAl(2) undergoes a cubic to tetragonal distortion below T = 30 K in a zero magnetic field, but the system recovers its cubic symmetry upon the application of an external magnetic field of 10 kOe via a lifting of the 4f crystal field splitting. The nuclear Schottky specific heat in PrAl(2) is anomalously high compared to that of pure Pr metal. First principles calculations reveal that the 4f crystal field splitting in the tetragonally distorted phase of PrAl(2) underpins the observed unusual low temperature phenomena.
authors.affiliation: The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020, USA. pathak138@ameslab.gov
authors.forename: Arjun K
authors.initials: AK
authors.lastname: Pathak
authors.forename: D
authors.initials: D
authors.lastname: Paudyal
authors.forename: Y
authors.initials: Y
authors.lastname: Mudryk
authors.forename: K A
authors.initials: KA
authors.lastname: Gschneidner
authors.forename: V K
authors.initials: VK
authors.lastname: Pecharsky
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D006358:Hot Temperature; D008280:Magnetics; D011221:Praseodymium / Q000737:chemistry*; D013816:Thermodynamics; D014961:X-Ray Diffraction
chemical_list: D000535:Aluminum; D011221:Praseodymium