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在一定的宏观条件(温度、压力等)下,若多个系统某个特定的集体激发变得不稳定,该集体激发的现象。在钛酸钡(BaTiO3)一类的位移型铁电体中,某一特定的晶格振动模(通常是频率最低的横光学模)在温度趋于相变点时,其固有频率逐渐减小到零,晶体原子处于新的平衡位置,形成新的结构。
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热学、统计物理学
统计物理学
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material wave
material wave velocity
materia medica
materia medica derived from the sea
Materia Medica for Decoctions
Materia Medica for Dietary Therapy
Materia Medica for Dietotherapy
Materia Medica for Famine Relief
Materia Medica from the[Southern]Seaboard Area
Materia Medica of Sichuan
Materia Medica of South Yunnan
Materia Medica of the Kaibao Era
materiology
maternal and child health
maternal and child health information system and management
maternal and child health management
maternal and children health care system
maternal and children's health information system
maternal and infant health care law
maternal and infant health care supervision
maternal behavior
maternal behavior of livestock
Maternal & Child Health Care of China
maternal deprivation
maternal effect gene
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