KR101002503B1 - 자기 저항 소자 및 자기 메모리 - Google Patents
자기 저항 소자 및 자기 메모리 Download PDFInfo
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- KR101002503B1 KR101002503B1 KR1020080092664A KR20080092664A KR101002503B1 KR 101002503 B1 KR101002503 B1 KR 101002503B1 KR 1020080092664 A KR1020080092664 A KR 1020080092664A KR 20080092664 A KR20080092664 A KR 20080092664A KR 101002503 B1 KR101002503 B1 KR 101002503B1
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- South Korea
- Prior art keywords
- layer
- magnetic
- base layer
- magnetoresistive element
- magnetization
- Prior art date
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10B—ELECTRONIC MEMORY DEVICES
- H10B61/00—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices
- H10B61/20—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors
- H10B61/22—Magnetic memory devices, e.g. magnetoresistive RAM [MRAM] devices comprising components having three or more electrodes, e.g. transistors of the field-effect transistor [FET] type
-
- 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
-
- 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
- G11C11/161—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 details concerning the memory cell structure, e.g. the layers of the ferromagnetic memory cell
-
- 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
- G11C11/56—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency
- G11C11/5607—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using storage elements with more than two stable states represented by steps, e.g. of voltage, current, phase, frequency using magnetic storage elements
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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
- H01F10/12—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys
- H01F10/123—Thin magnetic films, e.g. of one-domain structure characterised by magnetic layers characterised by the composition being metals or alloys having a L10 crystallographic structure, e.g. [Co,Fe][Pt,Pd] thin films
-
- 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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- 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
- H01F10/3286—Spin-exchange coupled multilayers having at least one layer with perpendicular magnetic anisotropy
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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
- H10N50/01—Manufacture or treatment
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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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- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Nanotechnology (AREA)
- Manufacturing & Machinery (AREA)
- Hall/Mr Elements (AREA)
- Mram Or Spin Memory Techniques (AREA)
- Thin Magnetic Films (AREA)
Abstract
Description
Claims (23)
- 아몰퍼스 구조 혹은 미결정 구조를 갖는 제1 기초층과,상기 제1 기초층 위에 형성되고, 또한 NaCl 구조를 갖는 산화물로 구성되는 제2 기초층과,상기 제2 기초층 위에 형성되고, 또한 NaCl 구조를 갖고, 또한 (001)면에 배향하는 질화물로 구성되는 제3 기초층과,상기 제3 기초층 위에 형성되고, 또한 막면에 수직 방향의 자기 이방성을 갖고, 또한 L10 구조를 갖고, 또한 (001)면에 배향하는 강자성 합금으로 구성되는 제1 자성층과,상기 제1 자성층 위에 형성된 제1 비자성층과,상기 제1 비자성층 위에 형성되고, 또한 막면에 수직 방향의 자기 이방성을 갖는 제2 자성층을 구비하는 자기 저항 소자.
- 제1항에 있어서,상기 제1 및 제2 자성층 중 한쪽은, 자화 방향이 고정되고,상기 제1 및 제2 자성층의 다른 쪽은, 자화 방향이 변화 가능한 자기 저항 소자.
- 제1항에 있어서,상기 제3 기초층은, Ti, Zr, Nb, V, Hf, Ta, Mo, W, B, Al, 및 Ce 중 1개 이상의 원소를 함유하는 질화물을 함유하는 자기 저항 소자.
- 삭제
- 제1항에 있어서,상기 제1 기초층은, Fe, Co, 및 Ni 중 1개 이상의 원소와, B, Nb, Si, Ta, 및 Zr 중 1개 이상의 원소를 함유하는 금속을 함유하는 자기 저항 소자.
- 삭제
- 제1항에 있어서,상기 제2 기초층은, Mg, Ca, V, Nb, Mn, Fe, Co, 및 Ni 중 1개 이상의 원소를 함유하는 산화물을 함유하는 자기 저항 소자.
- 제1항에 있어서,상기 제3 기초층과 상기 제1 자성층 사이에 형성되고, 또한 정방정 구조 혹은 입방정 구조를 갖고, 또한 2.7 내지 3.0Å 혹은 3.7 내지 4.2Å의 범위의 격자 상수를 갖고, 또한 (001)면에 배향하는 금속을 함유하는 제4 기초층을 더 구비하는 자기 저항 소자.
- 제8항에 있어서,상기 제4 기초층은, Rh, Ir, Pd, Pt, Cu, Ag, 및 Au 중 적어도 1개의 원소로 이루어지는 금속, 혹은 이들 중 적어도 1개의 원소를 함유하는 합금을 함유하는 자기 저항 소자.
- 제1항에 있어서,상기 제1 자성층은, Fe, Co, Ni, 및 Cu 중 1개 이상의 원소와, Pd, Pt, 및 Au 중 1개 이상의 원소를 함유하는 자기 저항 소자.
- 제10항에 있어서,상기 제1 자성층은, B, Zr, 및 Ag 중 1개 이상의 원소를 합계로 20at% 이하의 농도로 함유하는 자기 저항 소자.
- 제10항에 있어서,상기 제1 자성층은, Mg, Ca, B, Al, Si, Fe, Co, Ni, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, 및 W 중 1개 이상의 원소를 함유하는 산화물 혹은 질화물을 20vol% 이하의 농도로 함유하는 자기 저항 소자.
- 제1항에 있어서,상기 제1 비자성층은, 산화 마그네슘을 함유하는 자기 저항 소자.
- 제1항에 있어서,상기 제2 자성층은, L10 구조를 갖고, 또한 (001)면에 배향하는 강자성 합금을 함유하는 자기 저항 소자.
- 제14항에 있어서,상기 제2 자성층은, Fe, Co, Ni, 및 Cu 중 1개 이상의 원소와, Pd, Pt, 및 Au 중 1개 이상의 원소를 함유하는 자기 저항 소자.
- 제1항에 있어서,상기 제3 기초층과 상기 제1 자성층 사이에 형성되고, 또한 페로브스카이트 구조를 가지며, 또한 (001)면에 배향되어 있는 제5 기초층을 더 구비하는 자기 저항 소자.
- 제16항에 있어서,상기 제5 기초층은, 도전성을 갖고, 또한 그 화학식은 ABO3으로 표현되며,"A"는, Ca, Sr, Ba, La로부터 선택되고,"B"는, Ti, V, Cr, Mn, Fe, Co, Ni, Nb, Mo, Ru, Ir, Pb로부터 선택되는 자기 저항 소자.
- 제1항에 있어서,상기 제2 자성층 위에 형성된 제2 비자성층과,상기 제2 비자성층 위에 형성되고, 또한 막면에 수직 방향의 자기 이방성을 갖고, 또한 자화 방향이 고정된 제3 자성층을 더 구비하고,상기 제1 자성층은, 자화 방향이 고정되고,상기 제2 자성층은, 자화 방향이 변화 가능한 자기 저항 소자.
- 제18항에 있어서,상기 제2 비자성층은, Au, Ag, 및 Cu 중 적어도 1개의 원소로 이루어지는 금속, 혹은 이들 중 적어도 1개의 원소를 함유하는 합금을 함유하는 자기 저항 소자.
- 제18항에 있어서,상기 제2 비자성층은, 산화 마그네슘을 함유하는 자기 저항 소자.
- 자기 저항 소자와, 상기 자기 저항 소자를 사이에 두도록 형성되고, 또한 상기 자기 저항 소자에 대하여 통전을 행하는 제1 전극 및 제2 전극을 포함하는 메모리 셀을 구비하고,상기 자기 저항 소자는,아몰퍼스 구조 혹은 미결정 구조를 갖는 제1 기초층과,상기 제1 기초층 위에 형성되고, 또한 NaCl 구조를 갖는 산화물로 구성되는 제2 기초층과,상기 제2 기초층 위에 형성되고, 또한 NaCl 구조를 갖고, 또한 (001)면에 배향하는 질화물로 구성되는 제3 기초층과,상기 제3 기초층 위에 형성되고, 또한 막면에 수직 방향의 자기 이방성을 갖고, 또한 L10 구조를 갖고, 또한 (001)면에 배향하는 강자성 합금으로 구성되는 제1 자성층과,상기 제1 자성층 위에 형성된 제1 비자성층과,상기 제1 비자성층 위에 형성되고, 또한 막면에 수직 방향의 자기 이방성을 갖는 제2 자성층을 구비하는 자기 메모리.
- 제21항에 있어서,상기 제1 전극에 전기적으로 접속된 제1 배선과,상기 제2 전극에 전기적으로 접속된 제2 배선과,상기 제1 배선 및 상기 제2 배선에 전기적으로 접속되고, 또한 상기 자기 저 항 소자에 쌍방향으로 전류를 공급하는 기입 회로를 더 구비하는 자기 메모리.
- 제22항에 있어서,상기 메모리 셀은, 상기 제2 전극과 상기 제2 배선 사이에 전기적으로 접속된 선택 트랜지스터를 포함하는 자기 메모리.
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