Superconductivity of the new medium-entropy alloy V4Ti2W with a body-centered cubic structure

Li，Kuan1; Lin，Weijie2,3; Guo，Ruixin2,3; Guo，Shu2,3; Zeng，Lingyong1; Li，Longfu1; Yu，Peifeng1; Wang，Kangwang1; Zhang，Chao1; Luo，Huixia1

2024-03-01

10.1016/j.mtcomm.2024.108444

Materials Today Communications   影响因子和分区

2352-4928

Medium- and high-entropy alloy (MEA and HEA) superconductors have attracted considerable interest since their discovery. This paper reports the superconducting properties of ternary tungsten-containing MEA VTiW for the first time. VTiW is a type II superconductor with a body-centered cubic (BCC) structure. This structure belongs to the space group Im3̅m (No. 229) with the cell parameters a= b = c = 3.10673(14) Å. Experimental results of resistivity, magnetization, and heat capacity indicate that the superconducting transition temperature of the MEA VTiW is roughly 5.0 K. The critical magnetic fields at the upper and lower ends are 9.93(2) T and 40.7(3) mT, respectively. Interestingly, few BCC MEA superconductors with VEC greater than 4.8 have been found. The addition of tungsten leads to a VEC of 4.83 e/a for VTiW, which is rarely higher than the 4.8 value. Adding tungsten element expands the variety of MEA alloys, which may improve the microstructure and mechanical properties of materials and even superconducting properties. This material could potentially offer a new platform for the investigation of innovative MEA and HEA superconductors.

Body-centered-cubic structure Medium-entropy alloy Superconductivity V4Ti2W

SCI ; EI

英语

其他

2-s2.0-85186507939

Scopus

1.School of Materials Science and Engineering,State Key Laboratory of Optoelectronic Materials and Technologies,Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices,Key Lab of Polymer Composite & Functional Materials,Sun Yat-Sen University,Guangzhou,No. 135, Xingang Xi Road,510275,China
2.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.International Quantum Academy,Shenzhen,518048,China

Li，Kuan,Lin，Weijie,Guo，Ruixin,et al. Superconductivity of the new medium-entropy alloy V4Ti2W with a body-centered cubic structure[J]. Materials Today Communications,2024,38.

Li，Kuan.,Lin，Weijie.,Guo，Ruixin.,Guo，Shu.,Zeng，Lingyong.,...&Luo，Huixia.(2024).Superconductivity of the new medium-entropy alloy V4Ti2W with a body-centered cubic structure.Materials Today Communications,38.

Li，Kuan,et al."Superconductivity of the new medium-entropy alloy V4Ti2W with a body-centered cubic structure".Materials Today Communications 38(2024).