JP4483666B2 - 磁気検出素子及びその製造方法 - Google Patents
磁気検出素子及びその製造方法 Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
- H01F41/30—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE]
- H01F41/302—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
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- G—PHYSICS
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- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
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- 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
- H01F10/08—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers
- H01F10/10—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition
- H01F10/18—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being compounds
- H01F10/193—Magnetic semiconductor compounds
- H01F10/1936—Half-metallic, e.g. epitaxial CrO2 or NiMnSb films
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- 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
- H01F10/3268—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn
- H01F10/3281—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn only by use of asymmetry of the magnetic film pair itself, i.e. so-called pseudospin valve [PSV] structure, e.g. NiFe/Cu/Co
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/10—Magnetoresistive devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N50/00—Galvanomagnetic devices
- H10N50/80—Constructional details
- H10N50/85—Magnetic active materials
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- 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
- H01F10/3263—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being symmetric, e.g. for dual spin valve, e.g. NiO/Co/Cu/Co/Cu/Co/NiO
-
- 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
- H01F10/3268—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn
- H01F10/3272—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn by use of anti-parallel coupled [APC] ferromagnetic layers, e.g. artificial ferrimagnets [AFI], artificial [AAF] or synthetic [SAF] anti-ferromagnets
- H01F10/3277—Exchange coupling of magnetic film pairs via a very thin non-magnetic spacer, e.g. by exchange with conduction electrons of the spacer the exchange coupling being asymmetric, e.g. by use of additional pinning, by using antiferromagnetic or ferromagnetic coupling interface, i.e. so-called spin-valve [SV] structure, e.g. NiFe/Cu/NiFe/FeMn by use of anti-parallel coupled [APC] ferromagnetic layers, e.g. artificial ferrimagnets [AFI], artificial [AAF] or synthetic [SAF] anti-ferromagnets by use of artificial ferrimagnets [AFI] only
Description
前記固定磁性層あるいは前記フリー磁性層の一方あるいは両方は、組成式が、CoaMnbXc(元素XはGe,Sn,Ga,Sbのうち1種または2種以上、a,b,cは原子%でありa+b+c=100原子%)で表される金属化合物からなるCoMnX合金層と、組成式がCodMneZf(元素ZはAl,Siのいずれか又は両方、d,e,fは原子%であり、d+e+f=100原子%)で表される金属化合物からなるCoMnZ合金層の積層構造を有し、
前記CoMnZ合金層が前記非磁性材料層側に位置しており、
原子%a:原子%b:原子%cは2:1:1であり、原子%d:原子%e:原子%fは2:1:1であり、
前記CoMnZ合金層の膜厚が1Å以上10Å以下であることを特徴とするものである。
前記固定磁性層あるいは前記フリー磁性層の一方あるいは両方を、組成式が、CoaMnbXc(元素XはGe,Sn,Ga,Sbのうち1種または2種以上、a,b,cは原子%でありa+b+c=100原子%)で表される金属化合物からなるCoMnX合金層と、組成式がCodMneZf(元素ZはAl,Siのいずれか又は両方、d,e,fは原子%であり、d+e+f=100原子%)で表される金属化合物からなるCoMnZ合金層の積層構造を有するものとして形成し、
原子%a:原子%b:原子%cを2:1:1にし、原子%d:原子%e:原子%fを2:1:1にし、
前記CoMnZ合金層の膜厚を1Å以上10Å以下で形成し、
このとき、前記CoMnZ合金層を前記非磁性材料層側に位置させることを特徴とするものである。
なお、前記CoMnX合金層の材料であるCoaMnbXc(元素XはGe,Sn,Ga,Sbのうち1種または2種以上、a,b,cは原子%でありa+b+c=100原子%)で表される金属化合物の、原子%a:原子%b:原子%cが2:1:1であると前記CoMnX合金層の結晶構造がL21型になりスピン依存性バルク散乱係数βが高くなるので好ましい。
なお、サンプル1及びサンプル2の磁気検出素子を形成するときには、290℃の温度で熱処理にかけた。
なお、磁気検出素子を形成するときには、290℃の温度で熱処理にかけた。
12 シード層
13 反強磁性層
14 固定磁性層
15 非磁性材料層
16 フリー磁性層
17 保護層
18 ハードバイアス層
19 絶縁層
20 電極層
Claims (11)
- 磁化方向が一方向に固定される固定磁性層と、前記固定磁性層に非磁性材料層を介して形成されたフリー磁性層を有する磁気検出素子において、
前記固定磁性層あるいは前記フリー磁性層の一方あるいは両方は、組成式が、CoaMnbXc(元素XはGe,Sn,Ga,Sbのうち1種または2種以上、a,b,cは原子%でありa+b+c=100原子%)で表される金属化合物からなるCoMnX合金層と、組成式がCodMneZf(元素ZはAl,Siのいずれか又は両方、d,e,fは原子%であり、d+e+f=100原子%)で表される金属化合物からなるCoMnZ合金層の積層構造を有し、
前記CoMnZ合金層が前記非磁性材料層側に位置しており、
原子%a:原子%b:原子%cは2:1:1であり、原子%d:原子%e:原子%fは2:1:1であり、
前記CoMnZ合金層の膜厚が1Å以上10Å以下であることを特徴とする磁気検出素子。 - 前記CoMnX合金層と前記CoMnZ合金層の間に、組成式がCogMnhXiZj(元素XはGe,Sn,Ga,Sbのうち1種または2種以上、元素ZはAl,Siのいずれか又は両方、g、h、i、jは原子%であり、g+h+i+j=100原子%)で表される金属化合物からなるCoMnXZ合金層が介在している請求項1記載の磁気検出素子。
- 前記CoMnXZ合金層には、前記非磁性材料層に近づくにつれて、元素Xの膜中濃度が低くなるとともに、元素Zの膜中濃度が高くなる領域が存在している請求項2記載の磁気検出素子。
- 反強磁性層と、この反強磁性層と接して形成され、前記反強磁性層との交換異方性磁界により磁化方向が固定される前記固定磁性層と、前記固定磁性層に前記非磁性材料層を介して形成された前記フリー磁性層とを有する請求項1ないし3のいずれかに記載の磁気検出素子。
- 前記フリー磁性層の上下に積層された非磁性材料層と、一方の前記非磁性材料層の上および他方の前記非磁性材料層の下に位置する前記固定磁性層を有する請求項1ないし3のいずれかに記載の磁気検出素子。
- 一方の前記固定磁性層の上および他方の前記固定磁性層の下に位置して、交換異方性磁界によりそれぞれの前記固定磁性層の磁化方向を一定の方向に固定する反強磁性層を有する請求項5記載の磁気検出素子。
- 前記固定磁性層、非磁性材料層、及びフリー磁性層の膜面に対して垂直方向にセンス電流が流される請求項1ないし6のいずれかに記載の磁気検出素子。
- 磁化方向が固定される固定磁性層と、前記固定磁性層に非磁性材料層を介して形成され、外部磁界により磁化方向が変動するフリー磁性層と、を有する磁気検出素子の製造方法において、
前記固定磁性層あるいは前記フリー磁性層の一方あるいは両方を、組成式が、CoaMnbXc(元素XはGe,Sn,Ga,Sbのうち1種または2種以上、a,b,cは原子%でありa+b+c=100原子%)で表される金属化合物からなるCoMnX合金層と、組成式がCodMneZf(元素ZはAl,Siのいずれか又は両方、d,e,fは原子%であり、d+e+f=100原子%)で表される金属化合物からなるCoMnZ合金層の積層構造を有するものとして形成し、
原子%a:原子%b:原子%cを2:1:1にし、原子%d:原子%e:原子%fを2:1:1にし、
前記CoMnZ合金層の膜厚を1Å以上10Å以下で形成し、
このとき、前記CoMnZ合金層を前記非磁性材料層側に位置させることを特徴とする磁気検出素子の製造方法。 - 前記CoMnX合金層と前記CoMnZ合金層の積層後、熱処理をする請求項8記載の磁気検出素子の製造方法。
- 前記CoMnX合金層と前記CoMnZ合金層の間に、組成式がCogMnhXiZj(元素XはGe,Sn,Ga,Sbのうち1種または2種以上、元素ZはAl,Siのいずれか又は両方、g、h、i、jは原子%であり、g+h+i+j=100原子%)で表される金属化合物からなるCoMnXZ合金層が形成される請求項9記載の磁気検出素子の製造方法。
- 前記CoMnXZ合金層には、前記非磁性材料層に近づくにつれて、元素Xの膜中濃度が低くなるとともに、元素Zの膜中濃度が高くなる領域が形成される請求項10記載の磁気検出素子の製造方法。
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JP2005111483A JP4483666B2 (ja) | 2005-04-08 | 2005-04-08 | 磁気検出素子及びその製造方法 |
US11/396,807 US7567413B2 (en) | 2005-04-08 | 2006-04-03 | Magnetic detecting element with diffusion-preventing layer between spacer Cu and magnetic layer, and method of manufacturing the same |
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US7499249B2 (en) * | 2005-04-28 | 2009-03-03 | Tdk Corporation | Spin valve-GMR element in which a non-metal laminate layer is provided as a free magnetic layer and method of manufacturing the same |
JP4544037B2 (ja) * | 2005-05-31 | 2010-09-15 | Tdk株式会社 | 磁気検出素子及びその製造方法 |
JP4381358B2 (ja) * | 2005-08-24 | 2009-12-09 | Tdk株式会社 | 磁気検出素子 |
US8810973B2 (en) * | 2008-05-13 | 2014-08-19 | HGST Netherlands B.V. | Current perpendicular to plane magnetoresistive sensor employing half metal alloys for improved sensor performance |
US8570691B2 (en) * | 2011-04-07 | 2013-10-29 | HGST Netherlands B.V. | TMR sensor film using a tantalum insertion layer and systems thereof |
JP5695697B2 (ja) * | 2013-05-09 | 2015-04-08 | 株式会社東芝 | 磁気抵抗効果素子、磁気ヘッド、磁気記録再生装置、および磁気抵抗効果素子の製造方法 |
JP5636468B2 (ja) * | 2013-05-09 | 2014-12-03 | 株式会社東芝 | 磁気抵抗効果素子、磁気ヘッド、および磁気記録再生装置 |
JP6119051B2 (ja) * | 2013-08-02 | 2017-04-26 | 株式会社東芝 | 磁気抵抗素子および磁気メモリ |
US9406365B1 (en) | 2015-01-26 | 2016-08-02 | International Business Machines Corporation | Underlayers for textured films of Heusler compounds |
US10283700B2 (en) | 2017-06-20 | 2019-05-07 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor memory structure with magnetic tunnel junction (MTJ) cell |
US10276634B2 (en) * | 2017-06-20 | 2019-04-30 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor memory structure with magnetic tunnel junction (MTJ) cell |
JP7022766B2 (ja) * | 2017-12-26 | 2022-02-18 | アルプスアルパイン株式会社 | トンネル磁気抵抗効果膜ならびにこれを用いた磁気デバイス |
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JP2003338644A (ja) | 2001-11-19 | 2003-11-28 | Alps Electric Co Ltd | 磁気検出素子及びその製造方法 |
US7035062B1 (en) * | 2001-11-29 | 2006-04-25 | Seagate Technology Llc | Structure to achieve sensitivity and linear density in tunneling GMR heads using orthogonal magnetic alignments |
JP2003309305A (ja) | 2002-04-17 | 2003-10-31 | Alps Electric Co Ltd | 磁気検出素子 |
JP4487472B2 (ja) | 2002-07-05 | 2010-06-23 | 株式会社日立製作所 | 磁気抵抗効果素子、及びこれを備える磁気ヘッド、磁気記録装置、磁気メモリ |
JP4237991B2 (ja) * | 2002-08-29 | 2009-03-11 | アルプス電気株式会社 | 磁気検出素子 |
JP2004146480A (ja) | 2002-10-23 | 2004-05-20 | Hitachi Ltd | ホイスラー磁性層と体心立方構造の非磁性中間層を積層した磁気抵抗効果素子および磁気ヘッド |
JP2006005185A (ja) * | 2004-06-18 | 2006-01-05 | Alps Electric Co Ltd | 磁気検出素子 |
JP2006073688A (ja) * | 2004-09-01 | 2006-03-16 | Alps Electric Co Ltd | 磁気検出素子 |
US20060050446A1 (en) * | 2004-09-03 | 2006-03-09 | Alps Electric Co., Ltd. | Magnetic sensing element including laminated film composed of half-metal and NiFe alloy as free layer |
JP4951864B2 (ja) * | 2005-03-02 | 2012-06-13 | Tdk株式会社 | 磁気検出素子 |
JP2006278386A (ja) * | 2005-03-28 | 2006-10-12 | Alps Electric Co Ltd | 磁気検出素子 |
US7558028B2 (en) * | 2005-11-16 | 2009-07-07 | Hitachi Global Storage Technologies Netherlands B.V. | Magnetic head with improved CPP sensor using Heusler alloys |
JP2007142257A (ja) * | 2005-11-21 | 2007-06-07 | Alps Electric Co Ltd | 磁気検出素子 |
US7672088B2 (en) * | 2006-06-21 | 2010-03-02 | Headway Technologies, Inc. | Heusler alloy with insertion layer to reduce the ordering temperature for CPP, TMR, MRAM, and other spintronics applications |
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