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.
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.
Misra
Sushil K
SK
Physics Department, Concordia University, Montreal, Que., Canada H3G 1M8. skmisra@vax2.concordia.ca
Andronenko
Serguei I
SI
Chand
Prem
P
Earle
Keith A
KA
Paschenko
Sergei V
SV
Freed
Jack H
JH
D000643:Ammonium Chloride / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D008345:Manganese; D044367:Phase Transition; D013696:Temperature
D000643:Ammonium Chloride; D008345:Manganese