Voltage modulated magnetic anisotropy of rare earth iron garnet thin films on a piezoelectric substrate

Gross, Miela J.; Misba, Walid Al; Hayashi, Kensuke; Bhattacharya, Dhritiman; Gopman, Daniel B.; Atulasimha, Jayasimha; Ross, Caroline A.

doi:10.1063/5.0128842

Cited by 5 publications

(1 citation statement)

References 64 publications

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“…20,108 We believe that our findings will attract the attention of the spintronic community for further exploration of long-range thermo-spin transport in different REIG-based magnetic thin films and heterostructures for tunable spincaloritronic efficiency by manipulating H K eff and α. For example, H K eff of the REIG thin films grown on piezoelectric substrates can be modulated by applying a gate voltage, 113 which can eventually influence ⟨ξ⟩ and hence the spincaloritronic efficiency. Therefore, our study also provides a step toward the development of efficient spincaloritronic devices based on voltage-controlled LSSE.…”

Section: ÷÷÷÷÷÷mentioning

confidence: 99%

Temperature Evolution of Magnon Propagation Length in Tm₃Fe₅O₁₂ Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping

Chanda,

Holzmann,

Schulz

et al. 2024

ACS Nano

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The magnon propagation length, ⟨ξ⟩, of a ferro-/ ferrimagnet (FM) is one of the key factors that controls the generation and propagation of thermally driven magnonic spin current in FM/heavy metal (HM) bilayer based spincaloritronic devices. For the development of a complete physical picture of thermally driven magnon transport in FM/HM bilayers over a wide temperature range, it is of utmost importance to understand the respective roles of temperature-dependent Gilbert damping (α) and effective magnetic anisotropy (K eff ) in controlling the temperature evolution of ⟨ξ⟩. Here, we report a comprehensive investigation of the temperature-dependent longitudinal spin Seebeck effect (LSSE), radio frequency transverse susceptibility, and broad-band ferromagnetic resonance measurements on Tm 3 Fe 5 O 12 (TmIG)/Pt bilayers grown on different substrates. We observe a significant drop in the LSSE voltage below 200 K independent of TmIG film thickness and substrate choice. This is attributed to the noticeable increases in effective magnetic anisotropy field, H K eff (∝K eff ) and α that occur within the same temperature range. From the TmIG thickness dependence of the LSSE voltage, we determined the temperature dependence of ⟨ξ⟩ and highlighted its correlation with the temperature-dependent H K eff and α in TmIG/Pt bilayers, which will be beneficial for the development of rare-earth iron garnet based efficient spincaloritronic nanodevices.

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Section: ÷÷÷÷÷÷mentioning

confidence: 99%

Temperature Evolution of Magnon Propagation Length in Tm₃Fe₅O₁₂ Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping

Chanda,

Holzmann,

Schulz

et al. 2024

ACS Nano

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Magneto‐Optical Bi‐Substituted Yttrium and Terbium Iron Garnets for On‐Chip Crystallization via Microheaters

Hayashi,

Dao,

Gross

et al. 2024

Advanced Optical Materials

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Ferrimagnetic iron garnets enable magnetic and magneto‐optical functionality in silicon photonics and electronics. However, garnets require high‐temperature processing for crystallization which can degrade other devices on the wafer. Here bismuth‐substituted yttrium and terbium iron garnet (Bi‐YIG and Bi‐TbIG) films are demonstrated with good magneto‐optical performance and perpendicular magnetic anisotropy (PMA) crystallized by a microheater built on a Si chip or by rapid thermal annealing. The Bi‐TbIG film crystallizes on Si at 873 K without a seed layer and exhibits good magneto‐optical properties with Faraday rotation (FR) of −1700 deg cm−1. The Bi‐YIG film also crystallizes on Si and fused SiO2 at 873 K without a seed layer. Rapidly cooled films exhibit PMA due to the tensile stress caused by the thermal expansion mismatch with the substrates, increasing the magnetoelastic anisotropy by 4 kJ m−3 versus slow‐cooled films. Annealing in the air for 15 s using the microheater yields fully crystallized Bi‐TbIG on the Si chip.

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Domain walls speed up in insulating ferrimagnetic garnets

Caretta,

Avci

2024

APL Materials

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Magnetic domain walls (DWs) are the finite boundaries that separate the regions of uniform magnetization in a magnetic material. They constitute a key research topic in condensed matter physics due to their intriguing physics and relevance in technological applications. A multitude of spintronic concepts for memory, logic, and data processing applications have been proposed, relying on the precise control of DWs via magnetic fields and electric currents. Intensive research into DWs has also spurred interest into chiral magnetic interactions, topology, and relativistic physics. In this article, we will first review the rapid evolution of magnetic DW research and, in particular, the current-driven DW motion enabled by the improved understanding of DW dynamics and the development of suitable ferrimagnetic thin films. We will then provide an outlook on future directions in DW dynamics research exploiting ferrimagnetic garnets as a tunable material platform.

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Voltage modulated magnetic anisotropy of rare earth iron garnet thin films on a piezoelectric substrate

Cited by 5 publications

References 64 publications

Temperature Evolution of Magnon Propagation Length in Tm₃Fe₅O₁₂ Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping

Temperature Evolution of Magnon Propagation Length in Tm₃Fe₅O₁₂ Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping

Magneto‐Optical Bi‐Substituted Yttrium and Terbium Iron Garnets for On‐Chip Crystallization via Microheaters

Domain walls speed up in insulating ferrimagnetic garnets

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Voltage modulated magnetic anisotropy of rare earth iron garnet thin films on a piezoelectric substrate

Cited by 5 publications

References 64 publications

Temperature Evolution of Magnon Propagation Length in Tm3Fe5O12 Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping

Temperature Evolution of Magnon Propagation Length in Tm3Fe5O12 Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping

Magneto‐Optical Bi‐Substituted Yttrium and Terbium Iron Garnets for On‐Chip Crystallization via Microheaters

Domain walls speed up in insulating ferrimagnetic garnets

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Product

Resources

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Temperature Evolution of Magnon Propagation Length in Tm₃Fe₅O₁₂ Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping

Temperature Evolution of Magnon Propagation Length in Tm₃Fe₅O₁₂ Thin Films: Roles of Magnetic Anisotropy and Gilbert Damping