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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
Title: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.
Authors:Misra SK,  Andronenko SI,  Chand P,  Earle KA,  Paschenko SV,  Freed JH
Link:https://www.ncbi.nlm.nih.gov/pubmed/15862243?dopt=Abstract
Category:J Magn Reson
PMID:15862243
Dept Affiliation: PHYSICS
1 Physics Department, Concordia University, Montreal, Que., Canada H3G 1M8. skmisra@vax2.concordia.ca

Description:

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.

J Magn Reson. 2005 Jun;174(2):265-9

Authors: Misra SK, Andronenko SI, Chand P, Earle KA, Paschenko SV, Freed JH

Abstract

EPR measurements have been carried out on a single crystal of Mn(2+)-doped NH(4)Cl(0.9)I(0.1) at 170-GHz in the temperature range of 312-4.2K. The spectra have been analyzed (i) to estimate the spin-Hamiltonian parameters; (ii) to study the temperature variation of the zero-field splitting (ZFS) parameter; (iii) to confirm the negative absolute sign of the ZFS parameter unequivocally from the temperature-dependent relative intensities of hyperfine sextets at temperatures below 10K; and (iv) to detect the occurrence of a structural phase transition at 4.35K from the change in the structure of the EPR lines with temperature below 10K.

PMID: 15862243 [PubMed - indexed for MEDLINE]