Absorption Spectra of NH $_{4}$ MnCl $_{3}$ and NH $_{4}$ MnF $_{3}$

F. Agulló-Rueda, J. M. Calleja, F. Jaque, J. D. Tornero

January 1986

Abstract

The absorption spectra of NH $_{4}$ MnCl $_{3}$ and NH $_{4}$ MnF$3 $c r y s t a l s h a v e b e e n m e a s u r e d d o w n t o 10 K i n t h e 250 t o 600 n m r e g i o n . T h e o b s e r v e d b a n d s a r e a s s i g n e d t o e l e c t r o n i c t r a n s i t i o n s f r o m t h e$ ^6A{1g} $(S) g r o u n d s t a t e t o v a r i o u s e x c i t e d l e v e l s o f M n$ ^{2+} $i o n s i n a n o c t a h e d r a l c r y s t a l l i n e f i e l d . T h e p o s i t i o n o f t h e b a n d s h a v e b e e n f i t t e d w i t h i n t h e s t r o n g c r y s t a l f i e l d s c h e m e . R e s u l t i n g p a r a m e t e r s a t r o o m t e m p e r a t u r e a r e$ B = 741 $,$ C = 2990 $a n d$ Dq = 520 $c m$ ^{-1} $f o r N H$ _4 $M n C l$ _3 $a n d$ B = 800 $,$ C = 3139 $a n d$ Dq = 694 $c m$ ^{-1} $f o r N H$ _4 $M n F$ _3$. At low temperature some bands show a rich fine structure in which some phonon progressions have been identified.

Type

Journal article

Publication

Solid State Commun. 60, 331–335 (1986)

Absorption Spectra of NH4MnCl3 and NH4MnF3

Abstract

Related

Absorption Spectra of NH $_{4}$ MnCl $_{3}$ and NH $_{4}$ MnF $_{3}$