The 1144 Iron-Based Superconductors (IBSC), characterized by the A(1)AE(1)Fe(4)As(4) chemical composition (A = Alkaline, AE = Alkaline-Earth), has gained significant interest in the recent years due to their crystalline structure characterized by an intrinsic modulation of the strain along the c-axis and by the proneness in forming crystalline defects with a positive impact on flux pinning. Moreover, it has been proved that the compound is compatible with the cost-effective powder-in-tube (PIT) manufacturing process. In our recent experiments, we have showed that the A(1)AE(1)Fe(4)As(4) structure can be tailored to obtain a 1144 compound characterized by different (A(x)AE(1-x))(AE(y)A(1-y))Fe4As4 chemical formulae without any depression in the critical temperature value. On the other hand, it has been recently shown that the doping with selected elements on both A and AE sites has a clear influence on the pinning and the grain boundary properties of poly-crystalline samples. In this work we report the results of the extensive magnetic characterization performed on pristine Ca1K1Fe4As4 and doped (A(x)Ca(1-x))(AE(y)K(1-y))Fe4As4 with Ba as dopant on the K site and either La or Na as dopant on the Ca site. In particular, the magnetization hysteresis loops recorded at different temperatures M(H, T) and the critical current density dependences extracted from the M(H) using the Bean model, J(c)(B, T), have been analyzed in order to assess the effect of aliovalent doping on the quality of the produced samples in terms of grain boundary properties and pinning efficiency.
Augieri, A., Duchenko, A., De Marzi, G., Varsano, F., Celentano, G., Pompeo, N., et al. (2024). Pinning Properties of 1144 Polycrystalline Samples With Aliovalent Doping. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 34(3), 1-5 [10.1109/tasc.2023.3348433].
Pinning Properties of 1144 Polycrystalline Samples With Aliovalent Doping
Duchenko, A.;Pompeo, N.;
2024-01-01
Abstract
The 1144 Iron-Based Superconductors (IBSC), characterized by the A(1)AE(1)Fe(4)As(4) chemical composition (A = Alkaline, AE = Alkaline-Earth), has gained significant interest in the recent years due to their crystalline structure characterized by an intrinsic modulation of the strain along the c-axis and by the proneness in forming crystalline defects with a positive impact on flux pinning. Moreover, it has been proved that the compound is compatible with the cost-effective powder-in-tube (PIT) manufacturing process. In our recent experiments, we have showed that the A(1)AE(1)Fe(4)As(4) structure can be tailored to obtain a 1144 compound characterized by different (A(x)AE(1-x))(AE(y)A(1-y))Fe4As4 chemical formulae without any depression in the critical temperature value. On the other hand, it has been recently shown that the doping with selected elements on both A and AE sites has a clear influence on the pinning and the grain boundary properties of poly-crystalline samples. In this work we report the results of the extensive magnetic characterization performed on pristine Ca1K1Fe4As4 and doped (A(x)Ca(1-x))(AE(y)K(1-y))Fe4As4 with Ba as dopant on the K site and either La or Na as dopant on the Ca site. In particular, the magnetization hysteresis loops recorded at different temperatures M(H, T) and the critical current density dependences extracted from the M(H) using the Bean model, J(c)(B, T), have been analyzed in order to assess the effect of aliovalent doping on the quality of the produced samples in terms of grain boundary properties and pinning efficiency.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
