The magnetic properties and the changes in the domain structure of alloy Sm(Co, Fe, Cu, Zr)_7.5 are studied after different variants of heat treatment, i.e. (1) quenching from 1200°C with cooling in a helium jet; (2) quenching and tempering at 800°C for 16 h, cooling at a rate of 50 K/min to room temperature; and (3) quenching, tempering at 800°C for 16 h, and cooling at a rate of 1.7 K/min. The influence of the heat treatment modes on the coercivity and the domain sizes is determined. The mechanism of variation of these characteristics is analyzed.

中文翻译：

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Sm(Co, Fe, Cu, Zr)7.5合金不同热处理阶段的磁性能和畴结构

研究了合金 Sm(Co, Fe, Cu, Zr) _7.5在不同热处理变体后的磁性能和畴结构的变化，即 ( 1 ) 从 1200°C 淬火并在氦射流中冷却；( 2 )800℃调质16h，以50K/min的速度冷却至室温；( 3 )淬火，800℃回火16h，以1.7K/min的速度冷却。确定热处理模式对矫顽力和畴尺寸的影响。分析了这些特性的变化机制。