Different effect of NiMnCo or FeNiCo on the growth of type-Ⅱa large diamonds with Ti/Cu as nitrogen getter - 李尚升 张贺 宿太超 胡强 胡美华 龚春生 马红安 贾晓鹏 李勇 肖宏宇 (Chinese physics B, 2017)