Magnetic properties of exchange-enhanced Pauli paramagnetic metals AeCo2P2 (Ae = Sr, Ba)

International Workshop on Itinerant-Electron Magnetism

Imai, M.^1 ; Michioka, C.^1 ; Ueda, H.^1 ; Matsuo, A.^2 ; Kindo, K.^2 ; Yoshimura, K.^1,3

Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto

606-8502, Japan^1

Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Chiba Kashiwa

277-8581, Japan^2

Research Center for Low Temperature and Materials Sciences, Kyoto University, Kyoto

606-8501, Japan^3

关键词: Applied field;    Itinerant-electron metamagnetic transitions;    Metamagnetic transitions;    Polycrystalline powders;    Quantum critical points;    Temperature-dependent magnetic susceptibility;    Weiss temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/868/1/012015/pdf
DOI  :  10.1088/1742-6596/868/1/012015

来源: IOP

【 摘 要 】

We have synthesized single crystals of AeCo2P2(Ae = Sr, Ba) and polycrystalline powder sample of Sr1-xBaxCo2P2, and measured their magnetic properties. SrCo2P2shows an itinerant-electron metamagnetic transition at Hc= 600 kOe and its temperature dependent magnetic susceptibility shows characteristic two anomalies at Tmax1= 25 and Tmax2= 115 K, suggesting it is in the vicinity of a ferromagnetic quantum critical point. While, BaCo2P2does not show the metamagnetic transition with the applied field up to 600 kOe, and its magnetic susceptibility shows only one anomaly corresponding to Tmax1at 33 K. In addition, the Weiss temperature of Sr1-xBaxCo2P2, decreases to negative as x increases. These results indicate the system recede from the quantum critical point by the Ba substitution.