NDLI: Domain wall pinning by fine precipitates

Content Provider	IEEE Xplore Digital Library
Author	Ishikawa, T. Hamada, Y. Ohmori, K.
Copyright Year	1965
Abstract	The addition of Nb to the Nd-Fe-B-type magnet causes precipitates to form within the hard magnetic grain. Domain-wall pinning effects of the precipitates were investigated by measuring an initial magnetization curve and by domain-wall observation in a magnetic field using Lorentz microscopy. Precipitates which were 500 A in size and 10/sup 15/ nuclei/cm/sup 3/ in density were produced in an Nb-doped (Nd,Dy)-Fe-B sintered magnet and found to contain Nb. A Lorentz micrograph showed that the domain walls pass through the precipitates. The initial magnetization increased abruptly, which indicates that the magnetization process is still nucleation-type. It was observed that almost all walls disappear under application of an external field of 5 kOe. It is concluded that the pinning effect is not strong enough to produce a significant increase in the coercive force of the permanent magnet and that the suppression of grain growth by niobium addition is the cause of the improvement of the coercivity.<>
Sponsorship	IEEE Magnetics Society
Starting Page	3434
Ending Page	3436
Page Count	3
File Size	529211
File Format	PDF
ISSN	00189464
Volume Number	25
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1989-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic domain walls Magnetic domains Coercive force Niobium Magnetic field measurement Scanning electron microscopy Demagnetization Magnetization processes Petroleum Annealing
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Domain wall pinning by fine precipitates

Domain wall propagation on nanometer scale: coercivity of a single pinning center

Measurement of domain wall energy and simulation of overwrite process on TbFeCo films

Magnetic viscosity and activation volume in domain wall pinning

Static and dynamic behaviour of complex domain walls

Effect of the hydrostatic pressure on the coercive force of polycrystalline garnets

Investigation on the dynamics of cross-tie walls in elliptical permalloy elements

Domain wall pinning at random inhomogeneities

Dot Size Dependence of Magnetization Reversal Process in ${rm L}1_{0}$-FePt Dot Arrays

Domain wall pinning by fine precipitates

Similar Documents

Domain wall pinning by fine precipitates

Domain wall propagation on nanometer scale: coercivity of a single pinning center

Measurement of domain wall energy and simulation of overwrite process on TbFeCo films

Magnetic viscosity and activation volume in domain wall pinning

Static and dynamic behaviour of complex domain walls

Effect of the hydrostatic pressure on the coercive force of polycrystalline garnets

Investigation on the dynamics of cross-tie walls in elliptical permalloy elements

Domain wall pinning at random inhomogeneities

Dot Size Dependence of Magnetization Reversal Process in ${rm L}1_{0}$-FePt Dot Arrays

Domain wall pinning by fine precipitates