Ferrimagnetic Resonance in Gadolinium Iron Garnet

Abstract

Ferrimagnetic resonance in single crystals of gadolinium iron garnet has been observed at 9479 and 23 725 mc. Crystals from two different preparations have different compensation points (13° and 32°C). The resonance behavior is discussed in terms of a two sublattice theory. gGd is equal to 2.006 above −90°C and increases at lower temperatures. The gadolinium ions contribute to the anisotropy below −40°. An extra resonance observed near the compensation point is attributed to inclusions in the crystals. The gadolinium apparently contributes substantially to the total damping of the magnetization.

Antiferromagnetic and Ferrimagnetic Resonance

“…The data extend from 1.5° K to 555° K and include ^-values, anisotropy fields, line widths, and calculations of anisotropy energy from a single-ion point of view. A rapid rise in line width and a rapid variation of ^-values were observed near the compensation temperature for G dIG similar to that of Calhoun et al [115]. A rapid rise in line width and a rapid variation of ^-values were observed near the compensation temperature for G dIG similar to that of Calhoun et al [115].…”

Stress-Induced Magnetic Properties of Gadolinium Iron Garnet Nanoscale-Thin Films: Implications for Spintronic Devices

“…On the basis of eq , K eff was calculated using temperature dependent values for M s ( T ), K 1 ( T ), , and λ 111 ( T ), as reported for bulk GdIG. A fully strained film is assumed, using the room temperature out-of-plane lattice mismatch of 0.4%, as measured by XRD for the 23 nm thick film.…”

Survey of Temperature Dependence of the Damping Parameter in the Ferrimagnet Gd3Fe5O12

“…which is normally measured by SQUID or VSM and provided in the literature. [17][18][19] Then the M Fe and M Gd can be calculated by solving simultaneous Eqs. ( 3) and (4).…”

“…The third set of data is from B. A. Calhoun et al 18,19 , where f res = 9.479GHz. Similar results to the above two datasets are obtained as shown in Fig.…”