Keyword search (3,448 papers available)


Angular variation of electron paramagnetic resonance spectrum: simulation of a polycrystalline EPR spectrum.

Author(s): Misra SK

J Magn Reson. 1999 Mar;137(1):83-92 Authors: Misra SK

Article GUID: 10053135
A rigorous evaluation of spin-Hamiltonian parameters and linewidth from a polycrystalline EPR spectrum.

Author(s): Misra SK

J Magn Reson. 1999 Sep;140(1):179-88 Authors: Misra SK

Article GUID: 10479561
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
Exchange-mediated spin-lattice relaxation of Fe3+ ions in borate glasses.

Author(s): Misra SK, Pilbrow JR

J Magn Reson. 2007 Mar;185(1):38-41 Authors: Misra SK, Pilbrow JR

Article GUID: 17140823
Simulation of slow-motion CW EPR spectrum using stochastic Liouville equation for an electron spin coupled to two nuclei with arbitrary spins: matrix elements of the Liouville superoperator.

Author(s): Misra SK

J Magn Reson. 2007 Nov;189(1):59-77 Authors: Misra SK

Article GUID: 17881269
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
Theory of EPR lineshape in samples concentrated in paramagnetic spins: effect of enhanced internal magnetic field on high-field high-frequency (HFHF) EPR lineshape.

Author(s): Misra SK, Diehl S

J Magn Reson. 2012 Jun;219:53-60 Authors: Misra SK, Diehl S

Article GUID: 22613039
Title:Theory of EPR lineshape in samples concentrated in paramagnetic spins: effect of enhanced internal magnetic field on high-field high-frequency (HFHF) EPR lineshape.
Authors:Misra SK,  Diehl S
Link:https://www.ncbi.nlm.nih.gov/pubmed/22613039?dopt=Abstract
Category:J Magn Reson
PMID:22613039
Dept Affiliation: PHYSICS
1 Physics Department, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, Quebec, Canada H3G 1M8. skmisra@alcor.concordia.ca

Description:

Theory of EPR lineshape in samples concentrated in paramagnetic spins: effect of enhanced internal magnetic field on high-field high-frequency (HFHF) EPR lineshape.

J Magn Reson. 2012 Jun;219:53-60

Authors: Misra SK, Diehl S

Abstract

A theoretical treatment is provided for the calculation of EPR (electron paramagnetic resonance) lineshape as affected by interactions with paramagnetic ions in the vicinity. The internal fields seen by the various paramagnetic ions due to interactions with paramagnetic ions in their vicinity, as well as the resulting lineshapes, become quite significant at high magnetic fields required in high-frequency (HFHF) EPR. The resulting EPR signals for the various ions are therefore characterized by different g-shifts and lineshapes, so that the overall EPR lineshape, which is an overlap of these, becomes distorted, or even split in HFHF EPR, from that observed at lower frequencies. The observed EPR lineshapes in MnSO(4)·H(2)O powder and K(3)CrO(8) single-crystal samples have been simulated here taking into account g-shifts and modified lineshapes. These simulations show that in these samples, concentrated in paramagnetic spins, the position and lineshapes of EPR signals are significantly modified in HFHF EPR involving very high magnetic fields.

PMID: 22613039 [PubMed - indexed for MEDLINE]