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1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Earth and Space Sciences · 术语表

什么是 Remanent magnetisation; Curie temperature？

又称： Curie temperature · remanent magnetisation

Definition 10.3 High School Earth and Space Sciences · 第 10 章 — From Continental Drift to Seafloor Spreading

The Curie temperature of a magnetic mineral is the temperature above which it cannot keep a magnetisation of its own: about $580\,{}^{\circ}\mathrm{C}$ for magnetite. A rock whose magnetic grains cool through their Curie temperature in the Earth’s field keeps a magnetisation parallel to the field of that time, the remanent magnetisation. It lasts long after the field has changed, unless the rock is heated again above the Curie temperature.

A lava flow cooling (schematic, Northern Hemisphere, where the field points north and down). The top of the flow has cooled below the Curie temperature of magnetite: its magnetic grains (black arrows) keep the direction of the field. The interior, still hotter, records nothing yet; it will record the field of the moment it cools.

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