Electron concentration effects on the Shastry-Sutherland phase stability in Ce2−xPd2+yIn<

Abstract

The stability of a Shastry-Sutherland ShSu phase as a function of electron concentration is investigated through the field dependence of thermal and magnetic properties of the solid solution Ce2−xPd2+yIn1−z in the antiferromagnetic branch. In these alloys the electronic (holes) variation is realized by increasing P d concentration. The AF transition TM decreases from 3.5 K to 2.8 K as P d concentration increases from y = 0.2 to y = 0.4. By applying magnetic field, the ShSu phase is suppressed once the field induced ferromagnetic polarization takes over at a critical field Bcr which increases with P d content. A detailed analysis around the critical point reveals a structure in the maximum of the ∂M/∂B derivative, which is related with incipient steps in the magnetization M (B) as predicted by the theory for the ShSu lattice. The crossing of M (B) isotherms, observed in ShSu prototype compounds, is also analyzed. The effect of In substitution by P d is interpreted as an increase of the number of 'holes' in the conduction band and results in a unique parameter able to describe the variation of the magnetic properties along the studied range of concentration.

The Magnetic Field Induced Ferromagnetism in EuPd2Sn4 Novel Compound

“…[6] In the past, we conducted a systematic investigation on RÀPdÀX (R ¼ Eu, Yb, Ce; X ¼ In, Sn) ternary compounds, among which a certain number of them exhibited anomalous physical behavior. [7][8][9][10] Concerning the EuÀPdÀSn system, novel compounds have been discovered, such as Eu 3 Pd 2 Sn 2 and EuPdSn 2 , showing a stable Eu 2þ magnetic state and complex magnetic structures. [11][12][13] This last feature, together with magnetic anisotropy, seems to characterize many compounds belonging to EuÀTÀX systems (T ¼ transition metals; X ¼ p-block elements).…”

“…In the last years we have carried out a systematic investigation on R-Pd-X ( R = Eu, Yb, Ce; X = In, Sn) ternary compounds among which a certain number of them exhibited anomalous physical behaviour [2,3,4,5].…”

Searching for a Quantum Critical Point in Rh doped ferromagnetic Ce2.15Pd1.95In0.9

“…The presence of this bi-critical point is not surprising if we consider the mentioned study of Ce 2±t Pd 2∓u In 1−v solid solutions [6]. From that study, one concludes that T cr = 4.…”

Suppression of ferromagnetic order by Ag-doping: a neutron scattering investigation on Ce2(Pd1−x Ag x )2In (x = 0.20, 0.50)

“…4,5,6 For instance, the Ce2Pd2In compound, isotypic with Mo2FeB2, shows a significant range of solubility with two branches corresponding to a ferromagnetic (FM) and antiferromagnetic (AFM) arrangement of the magnetic moments, depending on the electron/hole concentration on the Pd/In layer. 7 In the AFM branch the hole concentration is increased by an excess of Pd substituting In vacancies, whereas in the FM branch the electronic concentration is driven by an excess of Ce. Since both magnetic structures, based on the competition 2 between FM and AFM types of RKKY interactions, are comparable in energy, a large variety of magnetic behaviours have been observed in this family of alloys.…”