JP2012019214A - 熱閉じ込めを最適化した磁気デバイス - Google Patents
熱閉じ込めを最適化した磁気デバイス Download PDFInfo
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 227
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- 238000009413 insulation Methods 0.000 claims description 41
- 239000000463 material Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 description 19
- 238000003860 storage Methods 0.000 description 15
- 238000009826 distribution Methods 0.000 description 9
- 230000005290 antiferromagnetic effect Effects 0.000 description 7
- 230000000903 blocking effect Effects 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000005381 potential energy Methods 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- -1 BiTe Chemical compound 0.000 description 2
- 229910003321 CoFe Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 229910052741 iridium Inorganic materials 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 229920003209 poly(hydridosilsesquioxane) Polymers 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000005418 spin wave Effects 0.000 description 2
- 229910000763 AgInSbTe Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910015136 FeMn Inorganic materials 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 229910000618 GeSbTe Inorganic materials 0.000 description 1
- 229910005900 GeTe Inorganic materials 0.000 description 1
- 229910019041 PtMn Inorganic materials 0.000 description 1
- 229910018321 SbTe Inorganic materials 0.000 description 1
- 229910004541 SiN Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
- G11C11/16—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using elements in which the storage effect is based on magnetic spin effect
- G11C11/165—Auxiliary circuits
- G11C11/1675—Writing or programming circuits or methods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F10/00—Thin magnetic films, e.g. of one-domain structure
- H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
- H01F10/324—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer
- H01F10/3254—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the spacer being semiconducting or insulating, e.g. for spin tunnel junction [STJ]
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- Crystallography & Structural Chemistry (AREA)
- Nanotechnology (AREA)
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- Mram Or Spin Memory Techniques (AREA)
- Hall/Mr Elements (AREA)
- Semiconductor Memories (AREA)
Abstract
【解決手段】 本発明は、熱アシスト磁化反転書き込み操作を使用して書き込みを行うことができる磁気要素であって、第1の磁性層と第2の磁性層の間に配設された、トンネル障壁層から形成された磁気トンネル接合であって、第2の磁性層が第2の磁化を有し、第2の磁化の方向を、書き込み操作中、磁気トンネル接合が高いしきい値温度に加熱されるときに調節することができる磁気トンネル接合と、磁気トンネル接合の上端部に接続された上側電流ラインと、横方向に延在し、磁気トンネル接合の底端部に接続されたストラップ部分とを備え、磁気デバイスが、下側断熱層をさらに備え、下側断熱層が、ストラップ部分にほぼ平行に延在し、磁気トンネル接合と下側断熱層の間にストラップ部分が位置するように配置される磁気要素に関する。磁気要素は、書き込み操作中に熱損失を低減することができるようにし、電力消費を低減させる。
【選択図】 図4
Description
符号Z2で示される区域に位置されたストラップ部分7と、
区域Z4に位置され、厚さ5nmのCoFeの強磁性層および厚さ5nmのIrMnの反強磁性層を備える下側磁性層23と、
界面Z4/Z5に位置され、MgOからなり、厚さが1nmであるトンネル障壁層22と、
区域Z5に位置され、厚さ20nmのPtMnで作られた反強磁性基準層および厚さ5nmのCoFeで作られた強磁性基準層を備える上側磁性層21と、
区域Z7に位置された上側電流ライン4と
を備えると仮定して計算を行った。
2 磁気トンネル接合
21 上側磁性層、基準層
22 トンネル障壁層
23 下側磁性層、記憶層
3 選択トランジスタ
31 加熱電流
4 上側電流ライン
5 下側電流ライン
51 界磁電流
52 磁場
7 ストラップ部分
7’ ストラップ部分の底面
8 ポテンシャルエネルギー関数
9 トンネル効果による電子のトンネル障壁通過
10 フォノン
11 マグノン
14 上側熱障壁層
15 下側熱障壁層
16 下側電極
17 下側バイア
18 上側バイア
27 従来の断熱材料
28 下側断熱層
30 横方向断熱層
32 上側断熱層
40 断熱層を備えない場合のシミュレートされた温度分布
41 横方向断熱障壁層を備える場合のシミュレートされた温度分布
E ポテンシャルエネルギー
Efi 下側フェルミ準位
Efs 上側フェルミ準位
eV 2つのフェルミ準位の間の電位差
TBR 基準ブロッキング温度
TBS 記憶ブロッキング温度
Vheat 加熱電流を流すための電圧
X 距離
X0 長手方向座標
λin 非弾性平均自由行程
Claims (10)
- 熱アシスト磁化反転書き込み操作を使用して書き込みが行われる磁気要素であって、第1の磁性層と第2の磁性層の間に配設された、トンネル障壁層から形成された磁気トンネル接合であって、前記第2の磁性層が第2の磁化を有し、前記第2の磁化の方向を、書き込み操作中、磁気トンネル接合が高いしきい値温度に加熱されるときに調節されることができる磁気トンネル接合と、前記磁気トンネル接合の上端部に接続された上側電流ラインと、横方向に延在し、前記磁気トンネル接合の底端部に接続されたストラップ部分とを備える磁気要素であって、
前記磁気デバイスが、下側断熱層をさらに備え、前記下側断熱層が、前記ストラップ部分にほぼ平行に延在し、前記磁気トンネル接合と前記下側断熱層の間に前記ストラップ部分が位置するように配置された、磁気要素。 - 前記上側電流ラインと前記磁気トンネル接合の間に、前記磁気トンネル接合の上端部に配置された上側断熱層をさらに備える、請求項1に記載の磁気要素。
- 横方向断熱層をさらに備え、前記磁気トンネル接合の少なくとも一部分を横方向で埋め込む、請求項1に記載の磁気要素。
- 前記磁気トンネル接合の前記少なくとも一部分が、前記下側磁性層、前記上側磁性層、前記トンネル障壁層、または前記層のうちの任意の層の組合せを備える、請求項3に記載の磁気要素。
- 前記磁気トンネル接合の前記少なくとも一部分が、磁気トンネル接合全体を備える、請求項3に記載の磁気要素。
- 前記断熱層の熱伝導率が1.0Wm−1℃−1未満である、請求項1に記載の磁気要素。
- 前記断熱層が低誘電率材料から作られる、請求項1に記載の磁気要素。
- 前記磁気トンネル接合が、前記上側電流ラインと前記磁気トンネル接合の間にある上側熱障壁層と、前記磁気トンネル接合と前記ストラップ部分の間にある下側熱障壁層とをさらに備える、請求項1に記載の磁気要素。
- 前記長手方向熱障壁層の電気抵抗が、前記トンネル障壁層の電気抵抗の10分の1以下である、請求項8に記載の磁気要素。
- 複数の磁気要素を備える磁気メモリデバイスであって、各磁気要素が、熱アシスト磁化反転書き込み操作を使用して書き込みが行われるように適合され、第1の磁性層、第2の磁性層、および前記第1の磁性層と前記第2の磁性層の間に配設された、トンネル障壁層から形成された磁気トンネル接合であって、前記第2の磁性層が第2の磁化を有し、前記第2の磁化の方向を、書き込み中、前記磁気トンネル接合が高いしきい値温度に加熱されるときに調節されることができる磁気トンネル接合と、横方向に延在し、前記磁気トンネル接合の底端部に接続されたストラップ部分と、前記ストラップ部分にほぼ平行に延在し、前記磁気トンネル接合と下側断熱層の間に前記ストラップ部分が位置するように配置された下側断熱層とを備える、磁気メモリデバイス。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10290375A EP2405439B1 (en) | 2010-07-07 | 2010-07-07 | Magnetic device with optimized heat confinement |
EP10290375.4 | 2010-07-07 |
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JP2012019214A true JP2012019214A (ja) | 2012-01-26 |
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JP2011149682A Pending JP2012019214A (ja) | 2010-07-07 | 2011-07-06 | 熱閉じ込めを最適化した磁気デバイス |
Country Status (4)
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US (1) | US8411500B2 (ja) |
EP (1) | EP2405439B1 (ja) |
JP (1) | JP2012019214A (ja) |
RU (1) | RU2553410C2 (ja) |
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RU2011127847A (ru) | 2013-01-20 |
EP2405439A1 (en) | 2012-01-11 |
RU2553410C2 (ru) | 2015-06-10 |
EP2405439B1 (en) | 2013-01-23 |
US8411500B2 (en) | 2013-04-02 |
US20120008383A1 (en) | 2012-01-12 |
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