حذف ساختار Mn3Ga با تقارن بلوری کم از محلول آلیاژسازی Mn-Ga با افزودن Ge
نویسندگان
چکیده مقاله:
In this paper, milling was investigated as a method for production of Mn-Ga binary alloys and the effect of milling process on phase formation of Mn:Ga samples with 2:1 and 3:1 ratio within 1, 2 and 5 hour milling times was studied. For Mn:Ga samples, according to the results, Mn1.86Ga compound with tetragonal structure and I4/mmm space group was a stable phase. Also, some amounts of Mn3Ga compound with orthorhombic structure and Cmca space group was observed in the Mn:Ga solution. The effect of Ge addition, with the purpose of replacing Ge with Ga was also studied in Mn:Ga:Ge (3:0.5:0.5) sample. Although improved magnetic properties is expected with the addition of Ge, but increasing the coercivity was occurred, and saturation magnetization did not change significantly in the studied sample. Ge addition caused elimination of the possibility of formation of asymmetric orthorhombic Mn3Ga phase. In return, two new structures of Mn11Ge8 and MnGaGe were appeared. This phase change was confirmed by studying magnetic behaviour of samples. This behavior can be caused by unbalanced electrostatic forces resulting from Mn-Mn exchange interaction in Mn3Ga orthorhombic structure and substitution of some Ge atoms with Ga.
منابع مشابه
حذف ساختار mn۳ga با تقارن بلوری کم از محلول آلیاژسازی mn-ga با افزودن ge
در این پژوهش آسیاب کاری به عنوانی روشی برای ساخت آلیاژهایی دوتایی mn-ga و تأثیر آسیاب کاری بر فرایند تشکیل فاز نمونه های mn:ga با نسبت 2:1 و 3:1 در زمانهای 1، 2 و 5 ساعت مورد مطالعه قرار گرفت. در نمونههای mn:ga با توجه به نتایج حاصل شده، ترکیب mn1.86ga با ساختار تتراگونال و گروه فضایی i4/mmm فاز پایدار بود و هم چنین مقادیری از ترکیب mn3ga با ساختار اورتورومبیک و گروه فضایی cmca در محصول شناس...
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عنوان ژورنال
دوره 35 شماره 2
صفحات 55- 65
تاریخ انتشار 2016-09
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