Title :
Barium Ferrite Thin Films with Negative Nucleation Field for Self-biased Circulator Applications.
Author :
Juan, C. ; Hong, Y. ; Gee, S. ; Jalli, J.
Author_Institution :
Idaho Univ., Moscow
Abstract :
This paper presents a new method for BaM thin films having a negative nucleation field, consequently high squareness of film. Bi-layered BaM thin films were deposited by rf sputtering with high purity Ar and O2 gases on single crystal sapphire (000l) substrates. The bi-layer is composed of amorphous as a top layer and crystalline BaM films. A three-step rapid temperature annealing (RTA) was performed on bi-layered BaM film. All heat-treated BaM thin films were characterized by XRD, AFM, FE-SEM, VSM and surface profiler. The magnetic properties such as hysteresis loop, saturation magnetization and coercivity were investigated. Magnetic properties of this film could be applied to a self-biased circulator applications.
Keywords :
X-ray diffraction; amorphous magnetic materials; atomic force microscopy; barium compounds; coercive force; ferrite circulators; ferrites; field emission electron microscopy; magnetic hysteresis; magnetic thin films; nucleation; rapid thermal annealing; scanning electron microscopy; sputter deposition; AFM; Al2O3; BaFe12O19; BaM thin film bilayers; FE-SEM; RTA; VSM; X-ray diffraction; XRD; amorphous layer; atomic force microscopy; barium ferrite thin films; coercivity; crystalline film; field emission-scanning electron microscopy; hysteresis loop; negative nucleation field; rf sputtering; saturation magnetization; self-biased circulator; single crystal sapphire (000l) substrate; surface profiler; three-step rapid temperature annealing; vibrating sample magnetometer; Amorphous materials; Argon; Barium; Crystallization; Ferrite films; Gases; Magnetic films; Magnetic properties; Sputtering; Substrates;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.376231
