Tunable permalloy-based films for magnonic devices

Magnetic properties in ultrathin 3d transition-metal binary alloys. II. Experimental verification of quantitative theories of damping and spin pumping

“…Our measured value of α = 0.0072 lies within the range of reported values. Similarly, many of our measured damping values for different alloy compositions lie within the range of reported values [22,[45][46][47][48][49][50]. Our measured damping of the pure elements and the Ni 80 Fe 20 and Co 90 Fe 10 alloys is compared to room temperature values found in literature in Table I, columns 2 and 3.…”

In Situ TEM Studies of Nanostructured Thermoelectric Materials: An Application to Mg‐Doped Zn4Sb3 Alloy

“…[21][22][23][24][25][26][27] Despite those advantages, the thermali nstability of Zn 4 Sb 3 is the main factor responsible for limitingi ts practical application in TEG. [17,[28][29][30][31][32][33] Therefore, many studies have focused on the stability of Zn 4 Sb 3 under differentc onditions, for example in inert gas, [23,33,34] air, [34] static vacuum, [23] and dynamic vacuum. [23,35] In those works, various techniques fore xample, thermogravimetric analyses (TGA), [23,33] high-temperature powder X-ray, [35] or high-temperature synchrotron powder X-ray diffraction, [17,[28][29][30][31][32] were employed to understand the degradation rate of materials.…”

“…Such nanostructures strongly enhances phonon scattering, resulting in ad ecreasei nt he thermal conductivity leading to a zT value of 1.4 at 718 K. of Zn 4 Sb 3 have proposed migration of high dynamic Zn into Zn interstitial (hcp)s ites at elevated temperature as the main mechanism of Zn 4 Sb 3 degradation. [17,[28][29][30][31][32][33][34][35][36] TheZ n 4 Sb 3 was also proposed to decompose into ZnSb and Zn, [21,[36][37][38] but this hypothesisw as only supported by indirect experimental work, for example, TE characterization in different conditions and high-temperature powder X-ray diffraction, [17,23] which could only give very limited understanding of the processes at atomic scales. There remained an umber of limitations:i )the explanation relied on experimental resultsc ollected from different typeso fs tudied sample;t hat is, powder materialsf or XRD and pressed pellet for TE characterization;i i) the test conditions of Zn 4 Sb 3 materials was not equivalent to the TE conditions (i.e.…”

Systematic study of magnetodynamic properties at finite temperatures in doped permalloy from first-principles calculations

“…The understanding of how transition metals or rare earth dopants can affect the properties of Py has been the focus of a number of recent experimental studies [5][6][7][8][9] . Typically in these studies, the ferromagnetic resonance 10 (FMR) technique is employed and α and M s are extracted from the linewidth of the uniform precession mode while A is extracted from the first perpendicular standing spin-wave mode 11,12 .…”