NDLI: Localized high-Q ferromagnetic resonance in nonuniform magnetic fields

Content Provider	IEEE Xplore Digital Library
Author	Zeskind, D. Morgenthaler, F.
Copyright Year	1965
Abstract	We report the observation of highly localized, unusually sharp resonances in microwave coupling between closely spaced antennas on the surface of a bulk single crystal YIG slab. The dc magnetic field is applied perpendicular to the slab. In a non-optimized experimental configuration, typical half-power bandwidth is 1.8 MHz at 2.5 GHz with insertion loss less than 10 dB. The resonances are magnetically tunable and therefore may prove useful in a variety of microwave filter applications. We hypothesize that the resonances result from the confinement of the mode energies to certain regions of high dc field gradient within the crystal. This selective confinement is made possible, in part, by the use of highly localized microwave excitation and sensing antennas. The resulting "gradient-bound" modes propagate along apparent internal "surfaces" which are effectively created by naturally occurring or artificially induced internal magnetic field gradients. Modes propagate along such surfaces without experiencing the loss mechanisms encountered at true surfaces. Consequently, the Q of the resulting resonance is primarily a result of the intrinsic linewidth of the bulk crystal along with normal microwave circuit loading considerations.
Sponsorship	IEEE Magnetics Society
Starting Page	1249
Ending Page	1251
Page Count	3
File Size	382326
File Format	PDF
ISSN	00189464
Volume Number	13
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1977-09-01
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 resonance Magnetic fields Magnetic confinement Microwave antennas Slabs Magnetic separation Microwave propagation Bandwidth Insertion loss Tunable circuits and devices
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

A 54-58 GHz tunable Ferrite filter

A tunable band-pass filter

Magnetically tunable band-pass filter utilizing coplanar-slotline junction

Tunable wideband microwave band-stop and band-pass filters using YIG/GGG-GaAs layer structures

Magnetically tunable superconducting resonators and filters

High Power Electronically Tunable Microwave Filters

Microwave magnetic thin-film devices

Tunable dispersion device based on a tapered fiber Bragg grating and nonuniform magnetic fields

Tunable High-Frequency Properties of Co–Ni Ferromagnetic Nanowires Through Composition Modulation

Localized high-Q ferromagnetic resonance in nonuniform magnetic fields

Similar Documents

A 54-58 GHz tunable Ferrite filter

A tunable band-pass filter

Magnetically tunable band-pass filter utilizing coplanar-slotline junction

Tunable wideband microwave band-stop and band-pass filters using YIG/GGG-GaAs layer structures

Magnetically tunable superconducting resonators and filters

High Power Electronically Tunable Microwave Filters

Microwave magnetic thin-film devices

Tunable dispersion device based on a tapered fiber Bragg grating and nonuniform magnetic fields

Tunable High-Frequency Properties of Co–Ni Ferromagnetic Nanowires Through Composition Modulation

Localized high-Q ferromagnetic resonance in nonuniform magnetic fields