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GS. Hari Srikanth (2019 IEEE Magnetics Distinguished Lecturer) sẽ có buổi giảng bài tại trường ĐH Phenikaa

Tổ chức IEEE magnetics society hàng năm lựa chọn khoảng 2 đến 3 làm IEEE Magnetics Distinguished Lecturer trong tổng số hàng nghìn các nhà vật lý – là chuyên gia trong lĩnh vực từ học của thế giới. Người được lựa chọn sẽ được tổ chức này tài trợ đi các nước trên thế giới giảng bài về từ học trong lịch vực mà người đó là chuyên gia. Rất vinh dự năm nay GS. Hari Srikanth thuộc University of South Florida, USA đã được lựa chọn và rất vui mùng là GS. Hari đã nhận lời đến thăm và trình bày bài giảng tại đại học Phenikaa.

  • Thời gian: 9h00, thứ tư, ngày 9 tháng 1 năm 2019
  • Địa điểm: Phòng hội thảo PRATI-PIAS, 167 Hoàng Ngân, Trung Hòa, Cầu Giấy, Hà Nội.
  • Tiêu đề bài giảng: Tuning magnetic anisotropy in nanostructures for biomedical and electromagnetic applications

Thông tin về bài giảng:

Magnetic nanoparticles have been building blocks in applications ranging from high density recording to spintronics and nanomedicine [1].  Magnetic anisotropies in nanoparticles arising from surfaces, shapes and interfaces in hybrid structures are important in determining the functional response in various applications. In this talk I will first introduce the basic aspects of anisotropy and discuss resonant RF transverse susceptibility, that we have used extensively, as a powerful method to probe the effective anisotropy in magnetic materials. Tuning anisotropy has a direct impact on the performance of functional magnetic nanoparticles in biomedical applications such as contrast enhancement in MRI and magnetic hyperthermia cancer therapy. I will focus on the role of tuning surface and interfacial anisotropy with a goal to enhance specific absorption rate (SAR) or heating efficiency. Strategies going beyond simple spherical structures such as exchange coupled core-shell nanoparticles, nanowire, nanotube geometries can be exploited to increase heating efficiency in magnetic hyperthermia [2,3]. In addition to biomedical applications, composites of anisotropic nanoparticles dispersed in polymers pave the way to a range of electrically and magnetically tunable materials for RF and microwave device applications [4]. This lecture will combine insights into fundamental physics of magnetic nanostructures along with recent research advances in their application in nanomedicine and electromagnetic devices.

References:

[1]
E.A. Périgo et al., “Fundamentals and advances in magnetic hyperthermia”, Appl. Phys. Rev. vol. 2, 041302 (2015)

[2]
Z. Nemati et al., “Core-shell iron/iron oxide nanoparticles: Are they promising
for magnetic hyperthermia?”, RSC Advances
vol. 6, 38697 (2016)

[3]
H. Khurshid et al., “Tuning exchange
bias in Fe/g-Fe2O3 core-shell nanoparticles: Impacts of
interface and surface spins”, Appl. Phys.
Lett.
vol. 104, 072407 (2014)

[4] K. Stojak et al., “Polymer nanocomposites exhibiting magnetically tunable
microwave properties”, Nanotechnology
vol. 22, 135602 (2011)

Thông tin về GS. Hari Srikanth

Hari Srikanth is
a Professor of Physics at the University of South Florida in Tampa, FL. He
received his Ph.D. in experimental condensed matter physics from the Indian
Institute of Science. After postdoctoral research for several years, Hari
joined USF in 2000 and established the Functional Materials Laboratory. His
research spans a wide range of topics including magnetic nanoparticles, magnetic
refrigerant materials, spin calorics and complex oxides. He has around 250
journal publications and given numerous invited talks. Hari is a Fellow of the American Physical Society and
a Senior Member of IEEE. He is also an
Associate Editor for Journal of Applied
Physics
. Hari has been closely involved with the MMM and INTERMAG conferences
for more than 15 years serving as Publication Editor, Publication Chair and on
program committees.