Abstract：Rhenium is an important material for research and engineering applications due to the high bulk modulus, high melting point and excellent creepresistance. Theresponse of the shear elastic constant C44 of rhenium to temperature and pressure is important to the design and application of rhenium and its alloy. Raman scattering technique has unique advantages in studying the shear elastic constant C44 of hexagonal closest packed (hcp) metal under different temperatures and pressures. However, it is difficult to obtain the signals of low wavenumber Raman scattering for hcp metals due tothe strong reflection and shallow penetration depth of metals, especiallyunder a certain temperature and pressure loading. In this work, the lateral-incidentRaman scattering technology was carried outtoreduce the influence of metal strong reflection on Raman spectra. Consequently, we successfully measured E2g modes of polycrystallinerhenium under different pressure and temperature. The shear elastic constant C44 is 133 GPa at ambient condition. And we obtainedthe response of the shear elastic constant C44 of rhenium to temperature and pressure. The results show that the elastic shear coefficient C44 of polycrystalline rhenium increases with the increase of the pressure, and decreases with the increase of temperature. And, this work proposes a good research method for the shear elastic constant of metal material with Raman scattering.
Key words：Rhenium; Raman spectroscopy; High pressure and high temperature; Shear elastic constant C44
戚 磊，雷 力，冯雷豪，蒲梅芳. 铼的弹性剪切参数C44对温度与压力响应的原位拉曼光谱研究[J]. 光谱学与光谱分析, 2018, 38(12): 3764-3768.
QI Lei, LEI Li, FENG Lei-hao, PU Mei-fang. Response of Elastic Shear Parameter C44 of Rhenium to Temperature and Pressure: A Raman Spectroscopy Study. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(12): 3764-3768.
[1] Vohra Y K，Duclos S J，Ruoff A L，et al. Physical Review B，1987，36：9790.
[2] Manghnani M H，Katahara K，Fisher E S，et al. Physical Review B，1974，9：1421.
[3] Bondarenko Y A，Kablov E N，Surova V A，et al. Metal Science and Heat Treatment，2006，48(7-8)：360.
[4] Koizumi Y，Kobayashi T，Yokokawa T，et al. Journal of the Japan Institute of Metals，2003，67(9)：468.
[5] Naumov A V，et al. Russian Journal of Non-Ferrous Metals，2007，48(6)：418.
[6] Goncharov A F，Gregoryanz E，Struzhkin V V，et al. ArXiv Preprint Cond-Mat，2001：0112404.
[7] Crowhurst J，Goncharov A F，Zaug J M，et al. Physical Review Letters，2004，92：115502.
[8] Olijnyk H，et al. Physical Review Letters，1992，68(14): 2232.
[9] Olijnyk H，Jephcoat A P，Refson K，et al. Europhysics Letters，2001, 53(4): 504.
[10] Olijnyk H，Nakano S，Jephcoat A P，et al. Journal of Physics: Condensed Matter，2006，18(48)：10971.
[11] Olijnyk H，Jephcoat A P，Novikov D L，et al. Physical Review B，2000，62(9)：5508.
[12] Ponosov Y S，Bolotin G A，et al. Physica Status Solidi(b)，1999，215(1)：137.
[13] Ponosov Y S，Loa I，Mogilenskikh V E，et al. Physica Status Solidi(c)，2004，1(11)：3114.
[14] Mao H K，Xu J A，Bell P M，et al. Journal of Geophysical Research: Solid Earth，1986，91(B5)：4673.
[15] Duffy T S，Shen G，Heinz D L，et al. Physical Review B，1999，60(22)：15063.
[16] Fisher E S，Dever D，et al. Trans. Metall. Soc. AIME，1967，48：239.
[17] Steinle-Neumann G，Stixrude L，Cohen R E，et al. Physical Review B，1999，60(2)：791.
