EPR measurements of the spin-hamiltonian zero-field splitting parameters as a function of temperature in MN2+-doped Cs2NaLaCl6

Electron paramagnetic resonance and optical absorption studies on Mn2+ ions doped in KZnClSO4·3H2O single crystals

“…Mn 2+ ion, a d 5 configuration high-spin ion has found wide use as an extremely powerful probe in the study of structural as well as dynamic aspects of crystalline state, by incorporating it in diamagnetic and paramagnetic host crystals [1,2]. The electron paramagnetic resonance (EPR) studies of Mn 2+ ions in different crystalline materials have been reported by number of authors [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. EPR spectrum of d 5 ion is particularly interesting when one is concerned with the local symmetry environment of the ion and a detailed study of d 5 ion in diamagnetic crystals gives the information about the environment around the paramagnetic ion.…”

An investigation on the temperature dependent zero-field splitting (ZFS) of Mn2+ doped Cs2NaLaCl6

“…In the experimental study [12], the effect of the temperature change on the ZFSP b 0 2 was analyzed by the following formula b 0 2 ¼ a 0 þ a 1 T þ a 2 cothðH=2TÞ, where a 0 , a 1 , and a 2 are adjustable parameters, H is the Debye temperature and the first two terms represent the thermal expansion (TE) of the lattice around the paramagnetic ion [26], whereas the third term represents the contribution of lattice vibration (LV). It was noted that this formula best fits the experimental results [12].…”

“…In addition to the room temperature EPR data [11], Quintanar et al also carried out temperature dependent EPR experiments of Mn 2+ doped Cs 2 NaLaCl 6 single crystal at X-band frequencies (9.2 GHz) and between 12.8 K and 300 K [12]. The presence of two structurally different Mn 2+ centers (hereafter denoted Mn 2+ (1) and Mn 2+ (2)) in the cubic crystalline lattice of Cs 2 NaLaCl 6 was suggested as results of these experiments.…”

Temperature dependence of the EPR spectrum of Co2+ ion in crystals Zn(BF4)2 × 6H2O

“…Electronic paramagnetic resonance is a sensitive method for the definition of a local environment of a paramagnetic ion [3], structural phase transitions [4], zero splitting of energy levels [5], as well as spin −spin and spin−lattice interactions [6]. The studies of EPR spectra of Mn 2+ (3d 5 ) and Ni 2+ (3d 8 ) ions in the above mentioned crystals were earlier carried out at normal and high pressure [7 −9].…”

“…The studies of EPR spectra of Mn 2+ (3d 5 ) and Ni 2+ (3d 8 ) ions in the above mentioned crystals were earlier carried out at normal and high pressure [7 −9]. New informations on the crystal and particularities of interactions can be received by searching spectra of ions with an electronic configuration of 3d 7 [10−13], which are much more coupled with the fluctuations of a lattice.…”