Physical properties and magnetic structure of a layered antiferromagnet PrPd0.82Bi2

• 来源期刊: 中国物理B（英文版）
• 关键词: correlated electronic system layered antiferromagnet neutron scattering magnetic structure
• 年，卷（期）: 2020,（6）
• 页码范围: 549-557
• 页数: 9页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab889f

摘要

We report the physical properties, crystalline and magnetic structures of singe crystals of a new layered antiferromag-netic (AFM) material PrPd0.82Bi2. The measurements of magnetic properties and heat capacity indicate an AFM phasetransition at TN～7 K. A large Sommerfeld coefficient of 329.23 mJ·mol?1·K?2 is estimated based on the heat capacity data, implying a possible heavy-fermion behavior. The magnetic structure of this compound is investigated by a combined study of neutron powder and single-crystal diffraction. It is found that an A-type AFM structure with magnetic propagationwavevector?=(000) is formed below TN. The Pr3+magnetic moment is aligned along the crystallographic c-axis withan ordered moment of 1.694(3) μB at 4 K, which is smaller than the effective moment of the free Pr3+ ion of 3.58 μB. PrPd0.82Bi2 can be grown as large as 1 mm×1 cm in area with a layered shape, and is very easy to be cleaved, providing a unique opportunity to study the interplay between magnetism, possible heavy fermions, and superconductivity.