Magnetic properties of praseodymium iron garnet and neodymium iron garnet

Abstract

%'e have measured saturation magnetization, ferromagnetic resonance linewidth, effective g factor, and magnetocrystalline anisotropy coefficients on single-crystal samples of praseodymium iron garnet (PrIG) and neodymium iron garnet (NdIG). Saturation magnetizations were measured from 77 to 550 K. The other properties were measured from 150 to 350 K in PrIG and from 200 to 450 K in NdIG. PrIG has a positive first-order magnetocrystalline anisotropy coefficient in contrast with all the other single rare-earth iron garnets. Our results support the idea that the contributions to linewidth and amsotropy of praseodymium and neodymium ions in an iron garnet lattice vary with lattice parameter.

Magnetic properties of bismuth-substituted neodymium iron garnet films on Gd3Ga5O12(100) substrates determined by ferromagnetic resonance measurements

“…The obtained values were greater than those reported by other research groups for YIG (ΔH pp = 53 Oe 29) ) or BIG (ΔH pp = 25 Oe 24) ). Also, the ΔH of the sample with x = 0 was slightly larger than that reported by another research group for NIG (ΔH is approximately 1 kOe 30) ). This relatively broad line width seems to be caused by the fact that the damping constants of these films are relatively large and that the magnitude and direction of both the perpendicular anisotropic field and the demagnetizing field have some degree of fluctuation.…”

Mild hydrothermal synthesis and ferrimagnetism of Pr3Fe5O12 and Nd3Fe5O12 garnets

“…Compared with the earlier magnetic studies [19,20], our data is more complete (ZFC and FC curves are added, the hysteresis loops are measured and applied to determine saturation magnetization Ms). Furthermore, the measured temperature range was extended and low field for thermo-magnetization curves and high field for hysteresis loops were applied.…”

“…References [19,20] state that their samples have been synthesized via the LPE method and the samples had Pb and Pt inclusion from the crucible and flux. The inclusion cannot be avoided for that LPE method needs PbO flux and high temperature and the Pb can affect some physical properties, for example, increase the optical absorption coefficient [25].…”

“…However, a rigorous literature search reveals that few papers devoted to the study of Pr 3 Fe 5 O 12 and Nd 3 Fe 5 O 12 exist. It has been reported that Fratello et al have synthesized successfully praseodymium and neodymium iron garnets by liquid phase epitaxy (LPE) on Sm 3 (ScGa) 5 O 12 substrates at about 875 and 900 1C [19,20]. By synchrotron radiation study, Komori recently determined the crystal structures of the above synthesized compounds [21,22].…”

Synthesis of Bi–Lu-Substituted Iron Garnet Films for Visualization of Magnetic Flux in High-TcSuperconductors

“…However, with decreasing temperature, the crystalline magnetic anisotropy energy due to increment of rare-earth ions. 11) This increased anisotropy energy may compete with growthinduced magnetic anisotropy, which causes non-linear magnetization curve. We have observed steplike magnetization curve for the (NdBiLu) 3 Fe 5 O 12 film which was grown by LPE technique (see Fig.…”