Preparation and Properties of the Ni2MnGa Magnetic Shape Memory Alloy

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2000,（4）
• 所属期刊栏目: Cross-disciplinary physics
• 页码范围: 296-297
• 页数: 2页
• 语种: 英文

摘要

The polycrystalline Ni4s.2Mn22.4 Ga29.4 alloys were prepared by means of melting in argon arc furnace. X-ray diffraction pattern indicates a fcc cubic structure with a lattice parameter of 0.5822nm at room temperature.The phase transformation temperatures were: 1°C for martensite start temperature, -11°C for martensite finish temperature, 3°C for austenite start temperature and 11°C for austenite start temperature, respectively. The results showed that the effect of magnetic field on the strains increases with the decrease of temperature. A strain of 2.1×10-4 was obtained with an applied magnetic field of 5 kOe at -66°C