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Using the full potential linearized augmented plane wave (FLAPW) method, we have explored the energy product and the coercivity field of rare-earth-free FeCo/FePt(001) multilayered exchange spring magnet systems. We have considered 5 and 7 monolayers (ML) of a FePt hard layer and 3, 5, 7, and 9 ML of a FeCo soft layer. The FeCo soft layers are found to show close to half metallic features, while the FePt hard layers manifest conventional metallic behavior. A giant perpendicular magnetocrystalline anisotropy energy (EMCA) is observed. For instance, an EMCA of 27.24 meV/cell is found in FeCo(9 ML)/FePt(7 ML) multilayer structure. The energy product almost linearly increases with increasing FeCo thickness, while the coercivity filed shows the opposite behavior. Interestingly, we have obtained that the multilayer structures display very large energy product and coercivity field. For example, FeCo(9 ML)/FePt(5 ML) multilayer has an energy product of about 82 MGOe and a coercivity field of about 130 KOe. Moreover, we find that the multilayer system may show enhanced coercivity field compared with that found in FeCo/FePt bilayer film structures, while the energy product is comparable to that observed in bilayer films. Therefore, our results may imply that the FeCo/FePt multilayer can be employed as a potential rare- earth-free permanent magnet material.

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기사명 저자명 페이지 원문 목차
Magnetism of a system interacting with a common environment Hyuk Jae Lee, Seok Lee, Jae Hun Kim pp.857-860

An efficient determination of the critical temperature of the Blume-Capel model Seol Ryu, Wooseop Kwak pp.861-865

Ramping study at the PLS-II storage ring T. Ha, Y. Joo, I. Hwang, M. Kim, B.J. Lee, S.S. Park, C. Kim, S. Shin pp.866-870

Photoproduction of K^*^ meson off the proton target with the Regge contributions Seung-il Nam, Byung-Geel Yu pp.871-880

Design of an rf separation system for a proton-rich radioisotope beam produced by using an in-flight fragment separator Myeongjin Kim, Chong-Cheol Yun, Jong-Won Kim, Jaeyu Lee pp.881-884

Design of a Si-CsI detector for cluster measurements in the large-acceptance multipurpose spectrometer at RAON Suhyun Lee, Songkyo Lee, Byungsik Hong, Kyong Sei Lee pp.885-891

Effect of annealing and semiconductor nanoparticle incorporation on the performance of hybrid bulk hetero-junction solar cells Nguyen Tam Nguyen Truong, Chinho Park, Jae Hak Jung, Vu Luan Nguyen Truong, Sung Sun Baik pp.892-896

In-band optical signal-to-noise ratio monitoring for suppression of effects of both polarization mode dispersion and the polarization extinction ratio of a polarization beam splitter based on enhanced tracking of the principal states of polarization Ki Ho Han pp.897-901

Transparent conductive gallium-doped indium oxide nanowires for optoelectronic applications S.H. Mohamed pp.902-905

EPR investigation of V^4+^ ions in GeO₂-B₂O₃-V₂O_5_ glasses and polycrystalline compounds Young Hoon Kim, Tae Ho Noh, Jae Peel Kang, Sung Duk Hong, Deok Choi, Seung Kee Song pp.906-911

Frequency-dependent admittance of a three-probe mesoscopic conductor J. Chuen, Ying Tian pp.912-917

Energy product and coercivity of a rare-earth-free multilayer FeCo/FePt exchange spring magnet Dongyoo Kim, Arqum Hashmi, Jisang Hong pp.918-923

Effect of in-plane uniaxial anisotropy on self-organized magnetic structures generated by the Dzyaloshinskii-Moriya interaction S.W. Oh, H.Y. Kwon, C. Won pp.924-929

Optical properties of organic semiconductor thin films : 2,6,9,10-tetrakis(phenylethynyl)anthracene Hosuk Lee, Hosun Lee, Jung A Hur, Min Ju Cho, Dong Hoon Choi, Tae Dong Kang pp.930-936

Effects of Mg incorporation by co-sputtering into the ZnO channel layer of thin-film transistors Jong Hoon Lee, Chang Hoi Kim, Hong Seung Kim, Nak Woon Jang, Young Yun, Lee Mi Do, Kyu Ha Baek pp.937-941

Improved light emission through an AlGaN coalescence layer of 365-nm ultraviolet lighting-emitting diodes on patterned sapphire substrates Young-Sun Kwak, Jun-Youb Lee, Hye-Rin Choi, Do-Hyung Kim, Dong-Seon Lee, Seong-Ran Jeon, Bo-Hyun Kong, Hyung-Koun Cho pp.942-948

Time-dependent nonlinear theory and numerical simulation of folded waveguide traveling wave tubes Wei Feng Peng, Zhong Hai Yang, Yu Lu Hu, Zan Cao, Yin-Fu Hu, Jin-Jun Feng, Xian-Ping Wu pp.949-953

Bias-stress-induced trapping effect of high-voltage field-plated AlGaN/GaN-on-Si heterostructure FETs Shinhyuk Choi, Jae-Gil Lee, Ho-Young Cha, Hyungtak Kim pp.954-958

Use of an adaptive neuro-fuzzy inference system to obtain the correspondence among balance, gait, and depression for Parkinson's disease Youngkeun Woo, Juwon Lee, Sujin Hwang, Cheol Pyo Hong pp.959-965

Role of the scattering phase function in the remote sensing of non-spherical dust aerosols Kwon Ho Lee pp.966-974

Optical configuration in a three-dimensional active retarder panel for the convenience of head tilting Taehyung Kim, Sunhwan Kim, Suk-Won Choi pp.975-979

Scalable energetic-impact deposition of a mixture composed of multi-walled carbon nanotubes and silver nanoparticles Jeongho Kim, Heon Kang, Seung Hun Huh, Sung-Ho Choi, Youn-Woo Hong, Doh-Hyung Riu pp.980-982

Erratum : Effects of Hydrogen Gas Injection on the Properties of SiOx Nanoparticles Synthesized by Using an Evaporation and Condensation Process 전영식, 장보윤, 김준수, 이진석, 최철희, 한문희 pp.983-983

참고문헌 (22건) : 자료제공( 네이버학술정보 )

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