Yusuke Itoh

Magnetic and magneto-optical properties through polarized Pt and Pd in TbFeCo/(Pt,Pd) multilayers

The magnetic and magneto-optical properties of TbFeCo/(Pt,Pd) multilayer films prepared by sputter-deposition are discussed in conjunction with their multilayer-structure. The effect of polarized Pt on the polar Kerr spectra is significant at ultraviolet photon energies (/spl sim/5 eV). A drastic increase in the magnetic moment for the TbFeCo(Pt,Pd) multilayers is observed. This result, together with a model to account for the observed magneto-optical spectra, suggests the existence of interfacial Fe-Pt and Fe-Pd alloy regions.

Interface effects on magnetic and magneto-optical properties of TbFeCo/Pt multilayers

The present paper discusses the interfacial structure and the effect on the magnetic and magneto-optical properties in TbFeCo/Pt multilayer films, in contrast with Fe/Pt multilayers. Both the magnetic and magneto-optical properties are explained well when an interfacial region very similar to an Fe-Pt alloy is assumed. Low angle X-ray diffraction analyses reveal that the Fe-Pt alloy-like interfacial regions are formed mainly on top of TbFeCo layers, but little on Pt layers, /spl omega//spl sigma//sub xy/ spectra indicate that polarization of Pt in the interfacial region is different from that in Fe/Pt multilayers.

Effect of Pt IN TbFeCo on Magnetic and Magneto-Optical Properties

The effect of Pt additives in TbFeCo(Pt)1Pt multilayers on magnetic and magneto optical properties is inve・tig鋼 ・ th・ p・Φendlcular m ・gnetic anis・t・・py ・・ n ・L・・t κ。・f・th・ m ・ltil ・y・ r・・bec・ mes 【a・g・・ (〜 2。5× 10 ・ ・rgl・m3 )with ・R 1・y・r・th・n th・t・f・ TbF・C。(Pt)・i・g1・ 1・y・・ AI・・, Pt l・y・・s a・e f・・nd t・ c・nt・ib・... ig・ifican ・ly t。 出 ・ p。豊arKerr・pec... a・ ・1・・a−vi ・1・t phb... e・e・gi・・ b・y・・d 3 ・V. Th・ K ・rr ・・... i・・ 〃。 and ・ll孟P・i・i・y グ κ a・e enhanced with increasing PしIayer−thickness tft, and become saturated at tm = 12A . This result implies that PI atoms ・pt・ ・b・・t 6 A 正・・m th・ i・ t・血 ce ・ a・e c・nt・ib・ti・g t・ ・h・ K ・r・・ acti ・ity− Th・ 1・・g・・t 。。hanc。men ・ i。 ,h。 K ,rr rotation 〃κ is f6und at about 5 eV . key words Magneto−optical, Pt layer , TbFeCo, Multilayer 、 Ultra・violet 一9−・ 工工 一leotronio ibra y The Institute of Image Information and Television Engineers NII-Electronic Library Service he sti ute f age formation nd elevision ngineers