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1. CN111902867 - RECORDING METHOD, RECORDING DEVICE, REPRODUCTION METHOD, REPRODUCTION DEVICE, AND HIGH-SPEED RESPONSE ELEMENT

Office
China
Application Number 201880091924.3
Application Date 05.12.2018
Publication Number 111902867
Publication Date 06.11.2020
Publication Kind A
IPC
G11B 5/02
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
02Recording, reproducing or erasing methods; Read, write or erase circuits therefor
G11B 5/706
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
68comprising one or more layers of magnetisable particles homogeneously mixed with a bonding agent
70on a base layer
706characterised by the composition of the magnetic material
H01F 1/113
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
10non-metallic substances, e.g. ferrites
11in the form of particles
113in a bonding agent
CPC
G11B 5/02
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
02Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
G11B 5/706
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
68comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
70on a base layer
706characterised by the composition of the magnetic material
H01F 1/113
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
10non-metallic substances, e.g. ferrites ; , e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
11in the form of particles
113in a bonding agent
G11B 5/012
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
012Recording on, or reproducing or erasing from, magnetic disks
G11B 5/70642
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
62Record carriers characterised by the selection of the material
68comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
70on a base layer
706characterised by the composition of the magnetic material
70626containing non-metallic substances
70642iron oxides
Applicants THE UNIVERSITY OF TOKYO
国立大学法人东京大学
OSAKA UNIVERSITY
国立大学法人大阪大学
FUJIFILM CORPORATION
富士胶片株式会社
Inventors OHKOSHI SHIN-ICHI
大越慎一
NAKAJIMA MAKOTO
中岛诚
SHIRATA MASASHI
白田雅史
DOSHITA HIROAKI
堂下广昭
Agents 永新专利商标代理有限公司 72002
Priority Data 2018-065699 29.03.2018 JP
Title
(EN) RECORDING METHOD, RECORDING DEVICE, REPRODUCTION METHOD, REPRODUCTION DEVICE, AND HIGH-SPEED RESPONSE ELEMENT
(ZH) 记录方法、记录装置、再生方法、再生装置、以及高速响应元件
Abstract
(EN)
Provided are a recording method and a recording device that make it possible to easily record information even in a magnetic recording medium in which epsilon iron oxide particles having high coercivity are used as a magnetic recording material. This recording device 10 is configured so as to perform the following: apply an external magnetic field Ho that causes the magnetization 3 of epsilon ironoxide particles to become inclined in a particle dispersion 1 including epsilon iron oxide particles; and irradiate with light L1 that excites the magnetization 3. In this way, although it is not possible to reverse the magnetization 3 using only an external magnetic field, the synergy of the inclination of the magnetization 3 and the photoexcitation of the magnetization 3 enables the recording device 10 to reverse said magnetization 3.

(ZH)
提出了即使是使用了具有高矫顽力的ε氧化铁粒子作为磁记录材料的磁记录介质,也能够容易地记录信息的记录方法以及记录装置。本发明的记录装置(10)对包含ε氧化铁粒子的粒子分散体(1)施加使ε氧化铁粒子的磁化(3)倾斜的外部磁场(Ho),照射使磁化(3)激发的光(L1)。由此,记录装置(10)由于磁化(3)的倾斜和磁化(3)的光激发的协同效果,能够使仅通过外部磁场不能使其反转的磁化(3)反转。