후열처리 온도에 따른 Co 박막의 구조 및 자성 특성 변화

Kangjin Park; Yeongjun Son; Sehwan Song; Jisung Lee; Seonghoon Han; Tae Seong Ju; Dooyong Lee; Songkil Kim; Sungkyun Park

doi:10.3938/NPSM.74.135

후열처리 온도에 따른 Co 박막의 구조 및 자성 특성 변화

Translated title of the contribution: Magnetic and Structural Variations Depending on the Annealing Temperature of Co Films on Al₂O₃(0001)

Kangjin Park, Yeongjun Son, Sehwan Song, Jisung Lee, Seonghoon Han, Tae Seong Ju, Dooyong Lee, Songkil Kim, Sungkyun Park

Research output: Contribution to journal › Article › peer-review

Abstract

This study deposited a cobalt (Co) film on the Al2O3(0001) substrate by a flash evaporation method to examine the structural and magnetic property variations depending on the various post-annealing temperatures. Co-film formed islands during annealing due to the surface energy mismatch between the metallic film and the insulating substrate. As a result, the post-annealed Co particles formed an ellipsoid shape with improved crystallinity as temperature increased. Structural analysis confirmed that the Co particles grew in the Co(111)-oriented FCC structure. Interestingly, there are different annealing-temperature-dependent characteristics of magnetic properties depending on the magnetic field direction due to the competing nature between the crystalline and shape anisotropy of the aggregated Co particles.

Translated title of the contribution	Magnetic and Structural Variations Depending on the Annealing Temperature of Co Films on Al₂O₃(0001)
Original language	Korean
Pages (from-to)	135-142
Number of pages	8
Journal	New Physics: Sae Mulli
Volume	74
Issue number	2
DOIs	https://doi.org/10.3938/NPSM.74.135
State	Published - Feb 2024

Keywords

Co islands
Dewetting
Magnetic anisotropy
Particle size and shape

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10.3938/NPSM.74.135

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title = "후열처리 온도에 따른 Co 박막의 구조 및 자성 특성 변화",

abstract = "This study deposited a cobalt (Co) film on the Al2O3(0001) substrate by a flash evaporation method to examine the structural and magnetic property variations depending on the various post-annealing temperatures. Co-film formed islands during annealing due to the surface energy mismatch between the metallic film and the insulating substrate. As a result, the post-annealed Co particles formed an ellipsoid shape with improved crystallinity as temperature increased. Structural analysis confirmed that the Co particles grew in the Co(111)-oriented FCC structure. Interestingly, there are different annealing-temperature-dependent characteristics of magnetic properties depending on the magnetic field direction due to the competing nature between the crystalline and shape anisotropy of the aggregated Co particles.",

keywords = "Co islands, Dewetting, Magnetic anisotropy, Particle size and shape",

author = "Kangjin Park and Yeongjun Son and Sehwan Song and Jisung Lee and Seonghoon Han and Ju, {Tae Seong} and Dooyong Lee and Songkil Kim and Sungkyun Park",

year = "2024",

month = feb,

doi = "10.3938/NPSM.74.135",

language = "Korean",

volume = "74",

pages = "135--142",

journal = "New Physics: Sae Mulli",

issn = "0374-4914",

publisher = "Korean Physical Society",

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TY - JOUR

T1 - 후열처리 온도에 따른 Co 박막의 구조 및 자성 특성 변화

AU - Park, Kangjin

AU - Son, Yeongjun

AU - Song, Sehwan

AU - Lee, Jisung

AU - Han, Seonghoon

AU - Ju, Tae Seong

AU - Lee, Dooyong

AU - Kim, Songkil

AU - Park, Sungkyun

PY - 2024/2

Y1 - 2024/2

N2 - This study deposited a cobalt (Co) film on the Al2O3(0001) substrate by a flash evaporation method to examine the structural and magnetic property variations depending on the various post-annealing temperatures. Co-film formed islands during annealing due to the surface energy mismatch between the metallic film and the insulating substrate. As a result, the post-annealed Co particles formed an ellipsoid shape with improved crystallinity as temperature increased. Structural analysis confirmed that the Co particles grew in the Co(111)-oriented FCC structure. Interestingly, there are different annealing-temperature-dependent characteristics of magnetic properties depending on the magnetic field direction due to the competing nature between the crystalline and shape anisotropy of the aggregated Co particles.

AB - This study deposited a cobalt (Co) film on the Al2O3(0001) substrate by a flash evaporation method to examine the structural and magnetic property variations depending on the various post-annealing temperatures. Co-film formed islands during annealing due to the surface energy mismatch between the metallic film and the insulating substrate. As a result, the post-annealed Co particles formed an ellipsoid shape with improved crystallinity as temperature increased. Structural analysis confirmed that the Co particles grew in the Co(111)-oriented FCC structure. Interestingly, there are different annealing-temperature-dependent characteristics of magnetic properties depending on the magnetic field direction due to the competing nature between the crystalline and shape anisotropy of the aggregated Co particles.

KW - Co islands

KW - Dewetting

KW - Magnetic anisotropy

KW - Particle size and shape

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DO - 10.3938/NPSM.74.135

M3 - Article

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VL - 74

SP - 135

EP - 142

JO - New Physics: Sae Mulli

JF - New Physics: Sae Mulli

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ER -

후열처리 온도에 따른 Co 박막의 구조 및 자성 특성 변화

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Keywords

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