title: Tunable magnetic orders in CePd2As2-xPx.
abstract: We report the successful synthesis of the polycrystalline compounds CePd2As2-xPx (0 ≤ x ≤ 2) and their physical properties by measuring transport, magnetic and thermodynamic behaviors as a function of temperature and/or magnetic field. Powder x-ray diffraction indicates that CePd2As2-xPx crystallizes in the ThCr2Si2-type tetragonal structure. CePd2As2 exhibits a moderate Sommerfeld coefficient of γ ≈ 88 mJ mol(-1) K(-2), and undergoes an antiferromagnetic (AFM) transition at the Néel temperature TN ≈ 15 K. Upon substituting As with P, the TN is nearly unchanged up to x ≃ 0.6, while a ferromagnetic (FM) transition develops below TN for x ≃ 0.4. The Curie temperature TC increases with increasing x and eventually merges with the AFM transition at x ≃ 0.6. With further increase of x, the system follows typical FM behaviors and its TC monotonically increases and reaches TC ≈ 28 K in CePd2P2. Moreover, a metamagnetic transition is observed in the As-rich samples, but vanishes for x ≥ 0.4. Such a tunable magnetic ground state may provide an opportunity to explore the possible quantum critical behavior in CePd2As2-xPx.
authors.affiliation: Center for Correlated Matter and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310027, People's Republic of China.
authors.forename: T
authors.initials: T
authors.lastname: Shang
authors.forename: Y H
authors.initials: YH
authors.lastname: Chen
authors.forename: W B
authors.initials: WB
authors.lastname: Jiang
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
authors.forename: L
authors.initials: L
authors.lastname: Jiao
authors.forename: J L
authors.initials: JL
authors.lastname: Zhang
authors.forename: Z F
authors.initials: ZF
authors.lastname: Weng
authors.forename: X
authors.initials: X
authors.lastname: Lu
authors.forename: H Q
authors.initials: HQ
authors.lastname: Yuan