自旋转变下铁铁方镁石高温高压下弹性-ZhongqingWu,1,2,3.PDFVIP

week ending PRL 110, 228501 (2013) P H Y S I C A L R E V I E W L E T T E R S 31 MAY 2013 Elastic Anomalies in a Spin-Crossover System: Ferropericlase at Lower Mantle Conditions 1,2,3 ˜ 1,4 1,5,* Zhongqing Wu, Joao F. Justo, and Renata M. Wentzcovitch 1Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455, USA 2Laboratory of Seismology and Physics of Earth’s Interior, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China 3Mengcheng National Geophysical Observatory, School of Earth and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China 4 ´ ˜ ˜ ˜ Escola Politecnica, Universidade de Sao Paulo, CP 61548, CEP 05424-970 Sao Paulo, Sao Paulo, Brazil 5Minnesota Supercomputer Institute, University of Minnesota, Minneapolis, Minnesota 55455, USA (Received 30 December 2012; published 30 May 2013) The discovery of a pressure induced iron-related spin crossover in Mg Fe O ferropericlase (Fp) and ð1-xÞ x Mg-silicate perovskite, the major phases of Earth’s lower mantle, has raised new questions about mantle properties which are of central importance to seismology. Despite extensive experimental work on the anoma