Magnetic domain structures of multilayered permalloy films for magnetic recording thin film heads.

Permalloy thin-film magnetic sensors

An mtroductlon to the theory of the amsotroplc magnetoresistance effect m ferromagnetic thm films IS given, endmg m a treatment of the mmlmahzatlon of the free energy which IS the result of the lntnnslc and extnnslc anlsotroples of the thm-film structure The amsotroplc magnetoreslstance effect m long stnps IS revlewed Attention IS given to problems hke the formation of domains and measures hke ...

Interface and temperature dependent magnetic properties in permalloy thin films and tunnel junction structures.

Magnetization dynamics and field dependent magnetization of different devices based on 25-30 nm thick Permalloy (Py) films: such as single Py layers (Py/MgO; Py/CoFeB/Al2O3) and Py inserted as a magnetic layer in magnetic tunnel junctions (Py/CoFe/Al2O3/CoFe; Py/CoFeB/Al2O3/CoFe; Py/MgO/Fe) have been extensively studied within a temperature range between 300 K down to 5 K. The dynamic response ...

FePt:SiO2 granular thin film for high density magnetic recording

Advanced Magnetic Thin-Film Heads Under Read-While-Write Operation

Advanced Magnetic Thin-Film Heads Under Read-While-Write Operation Frank Zhigang Wang A Read-While-Write (RWW) operation for tape and/or potentially disk applications is needed in the following three cases: 1. High reliability; 2. Data servo systems; 3. Buried servo systems. All these applications mean that the read (servo) head and write head are operative simultaneously. Consequently, RWW ope...

Spatially modulated magnetic structures in thin films

The axial next–nearest neighbour Ising (ANNNI) model is studied for thin films of up to L = 10 layers, with a distinct phase diagram for each film thickness. The systematics of the ordered phases, as obtained from mean–field theory, Monte Carlo simulations, and low temperature expansions, is discussed. Results are compared to those for the ANNNI model in the limit L −→ ∞. PACS numbers: 68.35.Rh...