Antiferromagnetic Resonance

Electron Paramagnetic Resonance of MnO[sub 2] Powders

“…On the other hand, MnO 2 formation may be accompanied by formation of other manganese oxides ͑MnO, Mn 2 O 3 , and Mn 3 O 4 ) exhibiting a paramagnetic absorption in the same region of the fields with g Х 2. [4][5][6][7][8][9] The nonstoichiometric structure of manganese dioxide should also be taken into account.…”

“…[4][5][6][7] A single line with g ϭ 2.00 and the width ⌬B Х 35 mT was recorded at room temperature. 4,5 It was reported 8 that in MnO the signals from defective Mn 3 O 4 (2MnO MnO 2 ) inclusions (g ϭ 2.005, ⌬B ϭ 25 mT) were observed as well. We know of only one work 9 which presents the parameters of an EPR signal in MnO 2 (g ϭ 2,13, ⌬B ϭ 176 mT).…”

“…There are several studies devoted to EPR properties of manganese oxides. [4][5][6][7][8][9] Among them, MnO was studied most thoroughly. [4][5][6][7] A single line with g ϭ 2.00 and the width ⌬B Х 35 mT was recorded at room temperature.…”

“…[4][5][6][7][8][9] Among them, MnO was studied most thoroughly. [4][5][6][7] A single line with g ϭ 2.00 and the width ⌬B Х 35 mT was recorded at room temperature. 4,5 It was reported 8 that in MnO the signals from defective Mn 3 O 4 (2MnO MnO 2 ) inclusions (g ϭ 2.005, ⌬B ϭ 25 mT) were observed as well.…”

Paramagnetic resonance studies of phase transitions in condensed materials

“…Included in magnetic resonance techniques are nuclear magnetic resonance, nuclear quadrupole resonance, and electron paramagnetic resonance (EPR). Early in the development of electron paramagnetic resonance, anomalous changes in line widths and intensities of resonances in such magnetic materials as MnS, MnO, and Cr,O, were observed near the Curie temperatures (Okamura, Torizuka and Kojima, 1951 ;Wangsness and Maxwell, 1950; Maxwell and McGuire, 1953). However, a full realization of the information that can be obtained from these data did not emerge until theories were developed relating the dynamical behavior of the spin fluctuations near the phase transition to the line width (Mori, 1963).…”