JP5300701B2 - 磁気トンネル接合デバイスおよびその製造方法 - Google Patents
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Description
磁性層、絶縁層および磁性層が順次に積層された磁気トンネル接合デバイスを製造した。磁性層は元素含有量1:1のFe50Pd50合金に20at%のホウ素を添加して(Fe50Pd50)80B20からなる磁性層を製造した。Fe50Pd50合金は整列された結晶構造を有し、垂直磁気異方性を有する。ここにホウ素を添加することによって磁性層を非晶質化した。磁性層の厚さは3nmであった。
(001)方向性を有するMgOからなる単結晶基板上にPt層を(001)方向性を有するように40nm蒸着した。ここで、Pt層は40nmの厚さを有し、非晶質磁性層の結晶性誘導層として機能した。その次に、(Fe50Pd50)80B20からなる磁性層をPt層の上に非晶質状態で蒸着した。(Fe50Pd50)80B20からなる磁性層の厚さは10nmであった。磁性層を蒸着して500℃で1時間熱処理した。
20 絶縁層
30 第2磁性層
40、42 水平異方性磁性層
50、52 結晶性誘導層
60 水平磁気異方性磁性層
62 垂直磁気異方性誘導層
100、200、300 磁気トンネル接合デバイス
Claims (11)
- 垂直磁気異方性を有する化合物を含む第1磁性層と、
前記第1磁性層の上に位置する絶縁層と、
前記絶縁層の上に位置し、垂直磁気異方性を有する第2磁性層と、
前記第2磁性層及び前記絶縁層の間に位置する水平磁気異方性磁性層と、
前記第2磁性層の上に位置する結晶性誘導層と
を含み、
前記第1磁性層および前記第2磁性層が(Fe100−xPdx)100−yByまたは(Fe100−xPtx)100−yByの化学式を有する化合物を含んで前記結晶性誘導層と結晶整合し、前記結晶性誘導層はFeを含むことを特徴とする磁気トンネル接合デバイス。 - 前記絶縁層はD100−zEzの化学式を有する化合物を含み、前記DはLi(リチウム)、Be(ベリリウム)、Na(ナトリウム)、Mg(マグネシウム)、Nb(ニオブ)、Ti(チタン)、V(バナジウム)、Ta(タンタル)、Ba(バリウム)、Pd(パラジウム)、Zr(ジルコニウム)、Ho(ホルミウム)、K(カリウム)、およびAg(銀)からなる群より選択された一つ以上の元素であり、前記EはO(酸素)、N(窒素)、C(炭素)、H(水素)、Se(セレン)、Cl(塩素)、およびF(フッ素)からなる群より選択された一つ以上の元素であることを特徴とする請求項1に記載の磁気トンネル接合デバイス。
- 前記第1磁性層および前記第2磁性層のうちの一つ以上の磁性層は正方晶系であることを特徴とする請求項1に記載の磁気トンネル接合デバイス。
- 前記水平磁気異方性磁性層はFe、CoFe、およびCoFeBからなる群より選択された一つ以上の元素を含むことを特徴とする請求項1に記載の磁気トンネル接合デバイス。
- 前記第1磁性層および前記絶縁層の間に位置する他の水平磁気異方性磁性層と
前記第1磁性層の下に位置する他の結晶性誘導層と
をさらに含むことを特徴とする請求項1に記載の磁気トンネル接合デバイス。 - 結晶性誘導層と、
前記結晶性誘導層の上に位置する垂直磁気異方性磁性層と、
前記垂直磁気異方性磁性層の上に位置する水平磁気異方性磁性層と、
前記水平磁気異方性磁性層の上に位置する絶縁層と、
前記絶縁層の上に位置する水平磁気異方性磁性層と、
前記水平磁気異方性磁性層の上に位置する垂直磁気異方性誘導層と
を含み、
前記垂直磁気異方性磁性層が(Fe100−xPdx)100−yByまたは(Fe100−xPtx)100−yByの化学式を有する化合物を含んで前記結晶性誘導層と結晶整合し、前記結晶性誘導層はFeを含むことを特徴とする磁気トンネル接合デバイス。 - 非晶質を含む第1磁性層を提供する段階と、
前記第1磁性層の上に絶縁層を提供する段階と、
前記絶縁層の上に水平磁気異方性磁性層を提供する段階と、
前記水平磁気異方性磁性層の上に非晶質を含む第2磁性層を提供する段階と、
前記第2磁性層の上にFeを含む結晶性誘導層を提供する段階と、
前記第1磁性層、前記絶縁層、前記水平磁気異方性磁性層、前記第2磁性層、および前記結晶性誘導層を共に熱処理して、前記第1磁性層および前記第2磁性層を結晶化する段階と
を含み、
前記第1磁性層および前記第2磁性層を結晶化する段階において、前記第1磁性層および前記第2磁性層が(Fe100−xPdx)100−yByまたは(Fe100−xPtx)100−yByの化学式を有する化合物を含んで前記結晶性誘導層と結晶整合することを特徴とする磁気トンネル接合デバイスの製造方法。 - 前記第1磁性層および前記第2磁性層を結晶化する段階において、前記第1磁性層および前記第2磁性層は垂直磁気異方性を有することを特徴とする請求項7に記載の磁気トンネル接合デバイスの製造方法。
- 前記第1磁性層および前記第2磁性層を結晶化する段階において、前記第1磁性層、前記絶縁層および前記第2磁性層を300℃乃至600℃で熱処理することを特徴とする請求項7に記載の磁気トンネル接合デバイスの製造方法。
- 前記第1磁性層および前記絶縁層の間に他の水平磁気異方性磁性層を提供する段階と、
前記第1磁性層の下に他の結晶性誘導層を提供する段階と
をさらに含み、
前記第1磁性層および前記第2磁性層を結晶化する段階において、前記他の水平磁気異方性磁性層と前記他の結晶性誘導層は、前記第1磁性層、前記絶縁層、前記水平磁気異方性磁性層、前記第2磁性層、および前記結晶性誘導層を共に熱処理されることを特徴とする請求項1に記載の磁気トンネル接合デバイスの製造方法。 - Feを含む結晶性誘導層を提供する段階と、
前記結晶性誘導層の上に磁性層を提供する段階と、
前記磁性層の上に水平磁気異方性磁性層を提供する段階と、
前記水平磁気異方性磁性層の上に絶縁層を提供する段階と、
前記絶縁層の上に水平磁気異方性磁性層を提供する段階と、
前記水平磁気異方性磁性層の上に垂直磁気異方性誘導層を提供する段階と、
前記結晶性誘導層、前記磁性層、前記水平磁気異方性磁性層、前記絶縁層、前記水平磁気異方性磁性層、および前記垂直磁気異方性誘導層を熱処理して、前記磁性層を結晶化する段階と
を含み、
前記磁性層を結晶化する段階において、
前記磁性層が(Fe100−xPdx)100−yByまたは(Fe100−xPtx)100−yByの化学式を有する化合物を含んで前記結晶性誘導層と結晶整合することを特徴とする磁気トンネル接合デバイスの製造方法。
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| CN114002252B (zh) * | 2021-12-31 | 2022-04-26 | 季华实验室 | 多层薄膜材料的垂直磁各向异性检测方法 |
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| JP2009081215A (ja) | 2007-09-25 | 2009-04-16 | Toshiba Corp | 磁気抵抗効果素子およびそれを用いた磁気ランダムアクセスメモリ |
| JP4738395B2 (ja) * | 2007-09-25 | 2011-08-03 | 株式会社東芝 | 磁気抵抗効果素子およびそれを用いた磁気ランダムアクセスメモリ |
| JP2009081315A (ja) * | 2007-09-26 | 2009-04-16 | Toshiba Corp | 磁気抵抗素子及び磁気メモリ |
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| JP2009212156A (ja) * | 2008-02-29 | 2009-09-17 | Toshiba Corp | 磁気抵抗効果素子及びこれを用いた磁気メモリ |
| US8932667B2 (en) * | 2008-04-30 | 2015-01-13 | Seagate Technology Llc | Hard magnet with cap and seed layers and data storage device read/write head incorporating the same |
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| KR101115039B1 (ko) * | 2009-08-21 | 2012-03-07 | 한국과학기술연구원 | 자기터널접합 디바이스 및 그 제조 방법 |
| US8648589B2 (en) * | 2009-10-16 | 2014-02-11 | HGST Netherlands B.V. | Magnetoresistive sensor employing nitrogenated Cu/Ag under-layers with (100) textured growth as templates for CoFe, CoFeX, and Co2(MnFe)X alloys |
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| KR102082328B1 (ko) * | 2013-07-03 | 2020-02-27 | 삼성전자주식회사 | 수직 자기터널접합을 구비하는 자기 기억 소자 |
| US9236564B2 (en) * | 2013-12-11 | 2016-01-12 | Samsung Electronics Co., Ltd. | Method and system for providing an engineered magnetic layer including Heusler layers and an amorphous insertion layer |
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| US8841006B2 (en) | 2014-09-23 |
| KR101115039B1 (ko) | 2012-03-07 |
| EP2287863B1 (en) | 2017-11-15 |
| US20110045320A1 (en) | 2011-02-24 |
| JP2011044684A (ja) | 2011-03-03 |
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