Synthesis of Mg_1–xK_xB₂ from MgB₂ and KCl powders

Authors

Altero B. Bernardo Materials Science and Engineering Program, University of the Philippines Diliman
Pauline P. Tipones Materials Science and Engineering Program, University of the Philippines Diliman
Roland V. Sarmago National Institute of Physics, University of the Philippines Diliman
Margie P. Olbinado National Institute of Physics, University of the Philippines Diliman

Abstract

Mg_1–xK_xB₂ compound was synthesized from MgB₂ and KCl powders. Samples of Mg_1–xK_xB₂ at x=0.1 and x=0.15, were prepared under varying sintering temperatures. Samples are fine-grained and porous. Partial melting, and fused grains are evident at all sintering temperatures. Larger, more defined grain structure is seen for sample prepared at 830°C. A 0.6% increase in lattice parameter a and a 14% increase in lattice parameter c was observed for Mg_0.9K_0.1B₂, indicating successful K⁺ doping. Highest T_c was 37K for the Mg_0.9K_0.1B₂ sample sintered at 800°C. Lower T_c was obtained with increase in doping. For Mg_0.85K_0.15B₂ T_c averaged at 30K.

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Issue

2002: Proceedings of the 20th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2002-3C-01

Section

Condensed Matter and Plasma Physics

Published

2002-10-23

How to Cite

[1]

AB Bernardo, PP Tipones, RV Sarmago, and MP Olbinado, Synthesis of Mg1–xKxB2 from MgB2 and KCl powders, Proceedings of the Samahang Pisika ng Pilipinas 20, SPP-2002-3C-01 (2002). URL: https://proceedings.spp-online.org/article/view/SPP-2002-3C-01.