Nuclear magnetic resonance of 55Mn and 75As in MnAs

Electric field gradient and magnetic hyperfine field in the bulk and surfaces of compound

“…They concluded that the local magnetic properties in the MnAs bulk material and thin films are similar and cannot explain reduction of the saturated magnetization in the thin films. In an early study in 1982, Pinjare et al used NMR to measure and probe the temperature dependence of HFF and EFG in bulk MnAs and investigate phase transitions of this compound [12].…”

“…Moreover, the hyperfine interactions have been proposed as a mechanism of spin dephasing in the magnetic heterostructures [8]. High sensitivity of the magnetic properties of MnAs to the structural parameters has motivated several measurements of hyperfine field in this system [9][10][11][12]. Amako et al used nuclear magnetic resonance (NMR) spectroscopy to study the drastic decrease of the MnAs magnetic moment by decreasing a lattice constants [9].…”

Bloch Wall Anomaly at the Canted-Ferromagnetic Order-Order Transition of Mixed Double-Exchange/Superexchange Magnetic Systems

“…Note, that in magnetic metals NMR signals are usually identified as coming out of the Bloch walls (Bloch-wall-enhanced NMR) and thus are in particular sensitive to the Bloch wall configuration itself. Bloch-wall-enhanced 55 Mn NMR resonance frequency difference versus temperature for MnAs according to [12]; the two signals come out of the center and the edges of the Bloch wall and the frequency difference is inversely proportional to the Bloch wall thickness d. Winter [13] has calculated this frequency difference for an 180 domain wall to be Fig.…”

Thermal, magnetic and structural aspects of transitions in Mn0.63Cr0.37As. Thermodynamic properties from 10 to 350 K

“…The binary end members CrAs and MnAs of the Mnl_/CrtAs solid-solution phase have both been extensively studied due to their interesting magnetic and structural properties [1][2][3][4][5][6][7][8]. However, rather recently, more attention has been focused on Mnl_tCrtAs , the complex structural ~t,d magneuc properties of which have been studied by e.g., X-ray and neutron diffraction, magnetic susceptibility, magnetization, and DSC techniques [9][10][11][12][13].…”