Ⓨ䝯䝰䝸⏝☢ᛶయ䝘䝜ᵓ㐀 Keyword : 䝇䝢䞁䝖䝻䝙䜽䝇䚸ᙉ☢ᛶ䝖䞁䝛䝹᥋ྜ䚸㧗☢Ẽ␗᪉ᛶ ⊂❧⾜ᨻἲே㻌 ≀㉁䞉ᮦᩱ◊✲ᶵᵓ ᄂᆮỉ Ꮡ ሗᶵჾ䛾పᾘ㈝㟁ຊ䛿ႚ⥭䛾ㄢ㢟䛷䛒䜚䚸䝇䝢䞁ὀධᆺ☢Ẽ䝷䞁䝎䝮䜰䜽䝉䝇䝯䝰䝸䛻 ௦⾲䛥䜜䜛᪂つⓎ䝯䝰䝸䛻㛵䛩䜛◊✲㛤Ⓨ䛜άⓎ䛻䛺䛳䛶䛔䜛䚹ᆶ┤☢䛭䛾䛾ᶵ ⬟ᛶ䜢ව䛽ഛ䛘䛯ᙉ☢ᛶ䝖䞁䝛䝹᥋ྜ⣲Ꮚ䜔㛵㐃䛩䜛☢ᛶయ䝘䝜ᵓ㐀䛾㛤Ⓨ䛜㘽䛷䛒䜛䚹 ᄂᆮỉ ཀྵẟ 䝩䜲䝇䝷䞊ྜ㔠䛺䛹䛾᪂つᮦᩱ䜢⏝䛔䛯䜚䚸᪂䛯䛻䝘䝜ᵓ㐀䜢タィ䛩䜛䛣䛸䛻䜘䛳䛶䚸ᙉ☢ᛶ 䝖䞁䝛䝹᥋ྜ䜔㛵㐃䛩䜛☢ᛶయ䝘䝜ᵓ㐀⣲Ꮚ䛾㛤Ⓨ䛻䝤䝺䞊䜽䝇䝹䞊䜢䜒䛯䜙䛩䚹㠉᪂ⓗ䛺 ᶵ⬟ᛶ䛾Ⓨ⌧䜔ᖜ䛺≉ᛶᨵၿ䜢≺䛖䚹 இέᇢᄂᆮἚἦἕἁἋ ᪂つ䝖䞁䝛䝹䝞䝸䜰ᮦᩱ䠄䝇䝢䝛䝹⣔䠅 ≉ᛶᨵၿ䛾䛯䜑䛾ୗᆅᒙᮦᩱ 䝞䞁䝗ᢡ䜚 ␚䜏ຠᯝ 䛾ᢚไ䛸 ᕧTMR ᪂䛧䛔㻌 䜶䝢䝍㻌 䜻䝅䝱㻌 䝹ᡂ㛗㻌 䛾Ⓨぢ㻌㻌 ᆶ┤☢ᙉ☢ᛶ䝖䞁䝛䝹᥋ྜ ᕧ䛺⏺㠃ᆶ┤☢Ẽ␗᪉ᛶ ➨୍ཎ⌮㻌 ィ⟬䛸䛾㻌 ┤᥋ẚ㍑㻌㻌 ૨ᴾ ྂᴾ LJƱNJ ඹ㬆䝖䞁 䝛䝹ຠᯝ㻌㻌 H. Sukegawa et al., Phys. Rev. B 184401 (2012); J.W. Koo et al., Appl. Phys. Lett. 103 192401 (2013); J.W. Koo et al., J. Phys. D: Appl. Phys. (Fast Track Comm.), in press; Z.C. Wen et al., Adv. Mater., in press. ܱဇ҄ƷႸ z䛝䛺☢Ẽᢠຠᯝ䠄ฟຊ䠅䜢ᐇ⌧䛩䜛᪂つ䝖䞁䝛䝹 z䝇䝢䞁ὀධᆺ☢Ẽ䝷䞁䝎䝮䜰䜽䝉䝇䝯䝰䝸 㻌 䝞䝸䜰ᮦᩱ⩌䛾ᐇド䛸䝯䜹䝙䝈䝮䛾ゎ᫂䠄䝇䝢䝛䝹⣔䠅 㻌 䠄STT-MRAM䠅 z㧗㞟✚䛻ᐤ䛩䜛䛝䛺⏺㠃ᆶ┤☢Ẽ␗᪉ᛶ㻌 z᪂つཎ⌮䛻䜘䜛పᾘ㈝㟁ຊᆺⓎ☢Ẽ䝯䝰䝸 ☢ᛶᮦᩱ䝴䝙䝑䝖㻌 䝇䝢䞁䝖䝻䝙䜽䝇䜾䝹䞊䝥㻌 ୕㇂㻌 ㄔྖ E-mail : MITANI.Seiji䖃nims.go.jp 㻌㻌 㻌㻌㻌㻌㻌㻌 URL : http://www.nims.go.jp/apfim/spin/indexJ.html㻌 㻌 㻌 㻌 㻌 㻌 㻌 㻌 — 172 —
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