title: Stoner-enhanced paramagnetism in tungsten tetraboride.
abstract: We demonstrate that tungsten tetraboride (WB4), a heavy transition metallic compound without magnetic atoms, is an exchange-enhanced paramagnet revealed by the magnetization and specific heat measurements. WB4 has a small effective magnetic moment of 0.53 μB/fu. The high magnetic susceptibility in the magnitude of 1 memu (mol·Oe)(-1) below 10 K obeys quadratic temperature dependence. The upturn behavior of C(P)/T versus T(2) at low temperatures is attributed to the electron-paramagnon interactions. A high Stoner enhancement parameter, Z  =  0.93, was derived to explain the enhanced paramagnetism based on the Stoner model.
authors.affiliation: Research Center for Solid State Physics and Materials, School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215011, People's Republic of China.
authors.forename: Jiaoyan
authors.initials: J
authors.lastname: Shen
authors.forename: Jingming
authors.initials: J
authors.lastname: Zhou
authors.forename: Meng
authors.initials: M
authors.lastname: Zhao
authors.forename: Guozhen
authors.initials: G
authors.lastname: Liu
authors.forename: Ju
authors.initials: J
authors.lastname: Gao
authors.forename: Jinlei
authors.initials: J
authors.lastname: Yao