NDLI: Optical spectra and energy band gap of Ni-Zn ferrite

Content Provider	IEEE Xplore Digital Library
Author	Joshi, S.K. Rai, A.K. Srivastava, R.C. Singh, J.P. Rai, D.K.
Copyright Year	1965
Abstract	Photoacoustic spectroscopy (PAS) has been used to study solid Ni-Zn ferrite powder. Samples of structural formula Ni/sub 0.7+x/Zn/sub 0.3/Ti/sub x/Fe/sub 2-2m/O/sub 4/ (x=0.0-1.0 wt%) are prepared by solid state reaction. PA spectra show four absorption peaks at /spl sim/312, /spl sim/297, /spl sim/275 and /spl sim/260 nm. Peak intensity decreases rapidly with increasing energy. The peaks at 312 and 260 nm are assigned to 3d electrons transitions of Fe/sup 3+/ and the 297 and 275 nm peaks are most likely due to charge transfer transitions from oxygen to Fe(oct) and Fe(tetra). The peak at 297 nm disappears gradually when Ti substitution is increased. We attempted to establish the Ti effect by considering the fact that when Ti is substituted into the ferrite lattice, it is expected that the valence orbitals of the Ti ions mix covelantly with the 2p valence orbitals of the surrounding oxygen atoms. A similar mixing will also occur between the iron 3d orbitals and the Ti orbitals via the intervening oxygen atoms. We have also recorded PA spectra of Fe/sub 2/O/sub 3/, ZnO, NiCO/sub 3/ and TiO/sub 2/. By observing the position of the peaks and intensities, we have arrived at the conclusion that Fe/sup 3+/ ions govern the structure of base ferrite. For the first time, we have determined the energy band gap of such materials from their PA spectra.
Sponsorship	IEEE Magnetics Society
Starting Page	2356
Ending Page	2358
Page Count	3
File Size	44506
File Format	PDF
ISSN	00189464
Volume Number	37
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Photonic band gap Ferrites Iron Optical mixing Spectroscopy Powders Zinc Solid state circuits Absorption Electrons
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

Magnetic properties of nanocomposites containing Fe-Ni or Fe dispersed in a Mn-Zn ferrite matrix

Structural and Magnetic Characterizations of Coprecipitated Ni–Zn and Mn–Zn Ferrite Nanoparticles

Magnetic anisotropy of chemically coprecipitated Zn/sub 2/W ferrite

Ni-Zn Ferrites Composites With Almost Equal Values of Permeability and Permittivity for Low-Frequency Antenna Design

Ferromagnetic Resonance and Microwave Behavior of ASn-Substituted (A${=}$Ni-Co-Zn) BaM-Hexaferrites

A Study on Structure and Magnetic Properties of Mg-Cu-Zn Ferrite Synthesized by Co-Precipitation Method

Comparative Studies on the Structure and Magnetic Properties of Ni–Zn Ferrite Powders Prepared by Glycine-Nitrate Auto-combustion Process and Solid State Reaction Method

Broadening of EM Energy-Absorption Frequency Band by Micrometer-to-Nanometer Grain Size Reduction in NiZn Ferrite

Magnetic Property of Iron-Dust Cores With Mixture of Ferromagnetic Ferrite Powder and Alumina Powder

Optical spectra and energy band gap of Ni-Zn ferrite

Similar Documents

Magnetic properties of nanocomposites containing Fe-Ni or Fe dispersed in a Mn-Zn ferrite matrix

Structural and Magnetic Characterizations of Coprecipitated Ni&#8211;Zn and Mn&#8211;Zn Ferrite Nanoparticles

Magnetic anisotropy of chemically coprecipitated Zn/sub 2/W ferrite

Ni-Zn Ferrites Composites With Almost Equal Values of Permeability and Permittivity for Low-Frequency Antenna Design

Ferromagnetic Resonance and Microwave Behavior of ASn-Substituted (A${=}$Ni-Co-Zn) BaM-Hexaferrites

A Study on Structure and Magnetic Properties of Mg-Cu-Zn Ferrite Synthesized by Co-Precipitation Method

Comparative Studies on the Structure and Magnetic Properties of Ni–Zn Ferrite Powders Prepared by Glycine-Nitrate Auto-combustion Process and Solid State Reaction Method

Broadening of EM Energy-Absorption Frequency Band by Micrometer-to-Nanometer Grain Size Reduction in NiZn Ferrite

Magnetic Property of Iron-Dust Cores With Mixture of Ferromagnetic Ferrite Powder and Alumina Powder

Optical spectra and energy band gap of Ni-Zn ferrite

Structural and Magnetic Characterizations of Coprecipitated Ni–Zn and Mn–Zn Ferrite Nanoparticles