東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Pulsed Laser Deposited Iron Garnet T...

Khurana, Bharat,

Linked to FindBook

Google Book

Amazon

博客來

Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics // Bharat Khurana.
Author:	Khurana, Bharat,
Description:	1 electronic resource (149 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-08, Section: B.
Contained By:	Dissertations Abstracts International86-08B.
Subject:	Mass spectrometry. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31850982
ISBN:	9798304953610

Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics /
Khurana, Bharat,

Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics /Bharat Khurana. - 1 electronic resource (149 pages)

Source: Dissertations Abstracts International, Volume: 86-08, Section: B.

This thesis aims to develop materials for spintronic memories and demonstrate growth of iron garnet superlattices with layering at a sub unit cell scale. Iron garnet films are suitable for next generation spintronic memories because of their low Gilbert damping and their growth with perpendicular magnetic anisotropy (PMA) which promote fast domain wall dynamics. Additionally, selection of rare earth ion and substitution of cations in various sublattices of iron garnets enables tuning of their saturation magnetization, magnetocrystalline anisotropy, Gilbert damping and magnetostriction. Superlattices of garnets provide an opportunity to explore interfacial phenomena.We first study spin transport in platinum/scandium-substituted terbium iron garnet heterostructures. Epitaxial scandium-substituted terbium iron garnet (TbScIG) thin films were deposited on gadolinium gallium garnet [GGG, (111) orientation] substrates using pulsed laser deposition (PLD). Sc, a nonmagnetic cation, occupies up to 40% of the octahedral Fe sites. Anomalous Hall effect-like spin Hall magnetoresistance measurements were performed to determine the effect of scandium content on spin mixing conductance of the TbScIG|Pt interface. The spin mixing conductance increased significantly with an increase in Sc content. We then study bilayer films of bismuth-substituted yttrium iron garnet (BiYIG)/thulium iron garnet (TmIG) grown on garnet substrates that combine the non-zero interfacial Dzyaloshinskii-Moriya interaction (DMI) of TmIG with moderate damping between that of BiYIG and TmIG, making them useful for the development of high speed spin orbit torque driven magnetic devices. Lastly, we describe superlattices made from rare earth (RE = Tm, Tb, Lu) and bismuth iron garnets (IGs) grown by pulsed laser deposition. Superlattices of TmIG/TbIG show a composition modulation for layers as thin as 0.45 nm, less than one unit cell, and exhibit perpendicular magnetic anisotropy that is qualitatively different from the in-plane anisotropy of the solid solution (Tm,Tb)IG. BiIG/LuIG superlattices exhibit magnetic damping characteristic of the end members rather than the solid solution. Garnet superlattices may provide a playground for exploring interface physics within a vast parameter space of cation coordination and substitution.

English

ISBN: 9798304953610Subjects--Topical Terms:

551172
Mass spectrometry.
Subjects--Index Terms:

Thin films

Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics /
LDR:03635nmm a22004093i 4500 001 2433811
005 20250905091018.5
006 m o d
007 cr|nu||||||||
008 261011s2024 miu||||||m |||||||eng d
020 $a 9798304953610
035 $a (MiAaPQD)AAI31850982
035 $a (MiAaPQD)MIT17211155342
035 $a AAI31850982
040 $a MiAaPQD $b eng $c MiAaPQD $e rda
100 1 $a Khurana, Bharat, $e author. $3 3823570
245 1 0 $a Pulsed Laser Deposited Iron Garnet Thin Films for Spintronics / $c Bharat Khurana.
264 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2024
300 $a 1 electronic resource (149 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 86-08, Section: B.
500 $a Advisors: Ross, Caroline A.
502 $b Ph.D. $c Massachusetts Institute of Technology $d 2024.
520 $a This thesis aims to develop materials for spintronic memories and demonstrate growth of iron garnet superlattices with layering at a sub unit cell scale. Iron garnet films are suitable for next generation spintronic memories because of their low Gilbert damping and their growth with perpendicular magnetic anisotropy (PMA) which promote fast domain wall dynamics. Additionally, selection of rare earth ion and substitution of cations in various sublattices of iron garnets enables tuning of their saturation magnetization, magnetocrystalline anisotropy, Gilbert damping and magnetostriction. Superlattices of garnets provide an opportunity to explore interfacial phenomena.We first study spin transport in platinum/scandium-substituted terbium iron garnet heterostructures. Epitaxial scandium-substituted terbium iron garnet (TbScIG) thin films were deposited on gadolinium gallium garnet [GGG, (111) orientation] substrates using pulsed laser deposition (PLD). Sc, a nonmagnetic cation, occupies up to 40% of the octahedral Fe sites. Anomalous Hall effect-like spin Hall magnetoresistance measurements were performed to determine the effect of scandium content on spin mixing conductance of the TbScIG|Pt interface. The spin mixing conductance increased significantly with an increase in Sc content. We then study bilayer films of bismuth-substituted yttrium iron garnet (BiYIG)/thulium iron garnet (TmIG) grown on garnet substrates that combine the non-zero interfacial Dzyaloshinskii-Moriya interaction (DMI) of TmIG with moderate damping between that of BiYIG and TmIG, making them useful for the development of high speed spin orbit torque driven magnetic devices. Lastly, we describe superlattices made from rare earth (RE = Tm, Tb, Lu) and bismuth iron garnets (IGs) grown by pulsed laser deposition. Superlattices of TmIG/TbIG show a composition modulation for layers as thin as 0.45 nm, less than one unit cell, and exhibit perpendicular magnetic anisotropy that is qualitatively different from the in-plane anisotropy of the solid solution (Tm,Tb)IG. BiIG/LuIG superlattices exhibit magnetic damping characteristic of the end members rather than the solid solution. Garnet superlattices may provide a playground for exploring interface physics within a vast parameter space of cation coordination and substitution.
546 $a English
590 $a School code: 0753
650 4 $a Mass spectrometry. $3 551172
650 4 $a Tomography. $3 836553
650 4 $a Integrated circuits. $3 584067
650 4 $a Semiconductor research. $3 3683765
650 4 $a Solid solutions. $3 3566211
650 4 $a Quantum physics. $3 726746
650 4 $a Electrons. $3 516581
650 4 $a Internet access. $3 3410690
650 4 $a Information storage. $3 3701377
650 4 $a Personal computers. $3 3561037
650 4 $a Electromagnetism. $3 522050
650 4 $a Lasers. $3 535503
650 4 $a Topography. $3 3561794
650 4 $a Microscopy. $3 540544
650 4 $a Scientific imaging. $3 3560377
650 4 $a Anisotropy. $3 596747
650 4 $a Heavy metal music. $3 3695741
650 4 $a Magnetism. $3 524508
650 4 $a Transistors. $3 713271
650 4 $a Energy consumption. $3 631630
650 4 $a Thin films. $3 626403
650 4 $a Materials science. $3 543314
650 4 $a Engineering. $3 586835
653 $a Thin films
653 $a Iron garnets
690 $a 0599
690 $a 0794
690 $a 0537
710 2 $a Massachusetts Institute of Technology. $b Department of Materials Science and Engineering. $e degree granting institution. $3 3823568
720 1 $a Ross, Caroline A. $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-08B.
790 $a 0753
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31850982