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Variable-frequency EPR study of Mn(2+)-doped NH(4)Cl(0.9)I(0.1) single crystal at 9.6, 36, and 249.9 GHz: structural phase transition.

Author(s): Misra SK, Andronenko SI, Rinaldi G, Chand P, Earle KA, Freed JH

J Magn Reson. 2003 Feb;160(2):131-8 Authors: Misra SK, Andronenko SI, Rinaldi G, Chand P, Earle KA, Freed JH

Article GUID: 12615154
A variable temperature EPR study of Mn(2+)-doped NH(4)Cl(0.9)I(0.1) single crystal at 170 GHz: zero-field splitting parameter and its absolute sign.

Author(s): Misra SK, Andronenko SI, Chand P, Earle KA, Paschenko SV, Freed JH

J Magn Reson. 2005 Jun;174(2):265-9 Authors: Misra SK, Andronenko SI, Chand P, Earle KA, Paschenko SV, Freed JH

Article GUID: 15862243
Calculation of Double-Quantum-Coherence Two-dimensional Spectra: Distance Measurements and Orientational Correlations.

Author(s): Misra SK, Borbat PP, Freed JH

Appl Magn Reson. 2009 Dec 01;36(2-4):237-258 Authors: Misra SK, Borbat PP, Freed JH

Article GUID: 20161423
A 236-GHz Fe EPR STUDY OF NANO-PARTICLES OF THE FERRO-MAGNETIC ROOM-TEMPERATURE SEMICONDUCTOR Sn(1-x)Fe(x)O(2)(x=0.005).

Author(s): Misra SK, Andronenko SI, Punnoose A, Tipikin D, Freed JH

Appl Magn Reson. 2009 Dec 01;36(2):291-295 Authors: Misra SK, Andronenko SI, Punnoose A, Tipikin D, Freed JH

Article GUID: 20161547
A multifrequency EPR study of Fe2+ and Mn2+ ions in a ZnSiF(6).6H2O single crystal at liquid-helium temperatures.

Author(s): Misra SK, Diehl S, Tipikin D, Freed JH

J Magn Reson. 2010 Jul;205(1):14-22 Authors: Misra SK, Diehl S, Tipikin D, Freed JH

Article GUID: 20395160
Study of paramagnetic defect centers in as-grown and annealed TiO2 anatase and rutile nanoparticles by a variable-temperature X-band and high-frequency (236 GHz) EPR.

Author(s): Misra SK, Andronenko SI, Tipikin D, Freed JH, Somani V, Prakash O

J Magn Magn Mater. 2016 Mar 01;401:495-505 Authors: Misra SK, Andronenko SI, Tipikin D, Freed JH, Somani V, Prakash O

Article GUID: 27041794
Title:A 236-GHz Fe EPR STUDY OF NANO-PARTICLES OF THE FERRO-MAGNETIC ROOM-TEMPERATURE SEMICONDUCTOR Sn(1-x)Fe(x)O(2)(x=0.005).
Authors:Misra SK,  Andronenko SI,  Punnoose A,  Tipikin D,  Freed JH
Link:https://www.ncbi.nlm.nih.gov/pubmed/20161547?dopt=Abstract
Category:Appl Magn Reson
PMID:20161547
Dept Affiliation: PHYSICS
1 Physics Department, Concordia University, 1455 de Maisonneuve Boulevard West. Montreal, QC H3G 1M8, Canada.

Description:

A 236-GHz Fe EPR STUDY OF NANO-PARTICLES OF THE FERRO-MAGNETIC ROOM-TEMPERATURE SEMICONDUCTOR Sn(1-x)Fe(x)O(2)(x=0.005).

Appl Magn Reson. 2009 Dec 01;36(2):291-295

Authors: Misra SK, Andronenko SI, Punnoose A, Tipikin D, Freed JH

Abstract

High frequency (236 GHz) electron paramagnetic resonance (EPR) studies of Fe(3+) ions at 255 K are reported in a Sn(1-x)Fe(x)O(2) powder with x = 0.005 which is a ferromagnetic semiconductor at room temperature. The observed EPR spectrum can be simulated reasonably well as overlap of spectra due to four magnetically inequivalent high-spin (HS) Fe(3+) ions (S = 5/2). The spectrum intensity is calculated, using the overlap I(BL) + (I(HS1)+I(HS2)+I(HS3)+I(HS4))×e(-0.00001×B), where B is the magnetic field intensity in Gauss, I represents the intensity of an EPR line (HS1, HS2, HS3, HS4), and BL stands for the base line. (The exponential factor, as found by fitting to the experimental spectrum, is related to the Boltzmann population distribution of energy levels at 255 K, which is the temperature of the sample in the spectrometer.) These high-frequency EPR results are significantly different from those at X-band. The large values of the zero-field splitting parameter (D) observed here for the four centers at the high frequency of 236 GHz are beyond the capability of X-band, which can only record spectra of ions only with much smaller D values than those reported here.

PMID: 20161547 [PubMed - as supplied by publisher]