Singh, Jitendra Pal Kaur, Baljeet Gautam, Sanjeev Lim, Weon Cheol Asokan, Kandasami Chae, Keun Hwa 2024-01-20T03:00:28Z 2024-01-20T03:00:28Z 2021-09-04 2016-12 0749-6036 https://pubs.kist.re.kr/handle/201004/123388 Present review focuses the investigation carried out in order to understand the interface structure of magnetic tunnel junction (MTJ) by considering Fe/MgO/Fe as prototype structure. Tunneling magnetoresistence (TMR) of MTJ is affected by the spin polarization of ferromagnetic layers. This phenomena is governed by spin dependent tunneling in perfect MTJ. In MTJ with disordered interface, resonance states through interface play an important role. Some important phenomena like perpendicular magnetic anisotropy, spin transfer torques, and electrical switching are also affected by the interface structure. Apart from disorder and lattice mismatch, interface structure is governed by several factors like oxidation, defects, vacancies as well as hybridization among Fe(3d)-O(2p) states. These effects are categorized as 'chemical effects'. Due to these factors, contribution from interface resonance states dominates which reduces TMR and related properties. A discussion for determination of these effects are highlighted using several techniques like Xray photoelectron spectroscopy and X-ray absorption spectroscopy. Simulation results reveal modification of TMR via chemical effects occuring at interface in these MTJ. Thus tailoring of chemical effects in controlled manner is discussed to understand the interface assisted phenomena in these structures. Modification of the chemical effects is induced by irradiation of swift heavy ions, thereby, providing an opportunity to correlate chemical effects and TMR of MTJ. (C) 2016 Elsevier Ltd. All rights reserved. English ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD X-RAY PHOTOELECTRON-SPECTROSCOPY ELECTRONIC-STRUCTURE CIRCULAR-DICHROISM ION IRRADIATION SPIN MGO MAGNETORESISTANCE FE IRON Chemical effects at interfaces of Fe/MgO/Fe magnetic tunnel junction Article 10.1016/j.spmi.2016.10.015 1 SUPERLATTICES AND MICROSTRUCTURES, v.100, pp.560 - 586 SUPERLATTICES AND MICROSTRUCTURES 100 560 586 scie scopus 000391905300061 2-s2.0-85028270592 Physics, Condensed Matter Physics Article X-RAY PHOTOELECTRON-SPECTROSCOPY ELECTRONIC-STRUCTURE CIRCULAR-DICHROISM ION IRRADIATION SPIN MGO MAGNETORESISTANCE FE IRON Chemical effects Magnetic tunnel junction Interface resonance states Ion irradiation