Coercivity Enhancement in la Coated Nd-Fe-B Thin Films

Kunihiro Koike; Hiroya Ishikawa; Daisuke Ogawa; Hiroaki Kato; Takamichi Miyazaki; Yasuo Ando; Masaru Itakura

doi:10.1016/j.phpro.2015.12.144

Coercivity Enhancement in la Coated Nd-Fe-B Thin Films

Kunihiro Koike, Hiroya Ishikawa, Daisuke Ogawa, Hiroaki Kato, Takamichi Miyazaki, Yasuo Ando, Masaru Itakura

ENG - Applied Physics

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

The Nd-Fe-B/La thin films were deposited on the Al₂O₃(0001) substrate in order to investigate the effect of rare earth overlayer on the coercivity H_c. Highly textured Nd₂Fe₁₄B grains were grown by inserting the Mo(111) single crystal buffer layer. By depositing the La overlayer onto Nd₂Fe₁₄B thin films and subsequently post-annealing at 470 °C, the Hc value increased from about 10.5 kOe to 15.0 kOe. The amount of Hc increase by the combination of the La coating and post-annealing was about 4.5 kOe. After the post annealing, La oxide (hcp La₂O₃) was formed in the La layer, which was confirmed by means of XRD and SIMS depth profile measurements.

Original language	English
Pages (from-to)	1294-1299
Number of pages	6
Journal	Physics Procedia
Volume	75
DOIs	https://doi.org/10.1016/j.phpro.2015.12.144
Publication status	Published - 2015
Event	20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain Duration: 2015 Jul 5 → 2015 Jul 10

Keywords

La overlayer
NdFeB
coercivity
hcp-LaO

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10.1016/j.phpro.2015.12.144

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title = "Coercivity Enhancement in la Coated Nd-Fe-B Thin Films",

abstract = "The Nd-Fe-B/La thin films were deposited on the Al2O3(0001) substrate in order to investigate the effect of rare earth overlayer on the coercivity Hc. Highly textured Nd2Fe14B grains were grown by inserting the Mo(111) single crystal buffer layer. By depositing the La overlayer onto Nd2Fe14B thin films and subsequently post-annealing at 470 °C, the Hc value increased from about 10.5 kOe to 15.0 kOe. The amount of Hc increase by the combination of the La coating and post-annealing was about 4.5 kOe. After the post annealing, La oxide (hcp La2O3) was formed in the La layer, which was confirmed by means of XRD and SIMS depth profile measurements.",

keywords = "La overlayer, NdFeB, coercivity, hcp-LaO",

author = "Kunihiro Koike and Hiroya Ishikawa and Daisuke Ogawa and Hiroaki Kato and Takamichi Miyazaki and Yasuo Ando and Masaru Itakura",

note = "Funding Information: Partial financial support for this research was Industry Academia Collaborative R&D Programs, from Japan Science and Technology Agency (JST), Japan. Publisher Copyright: {\textcopyright} 2015 The Authors. Published by Elsevier B.V.; 20th International Conference on Magnetism, ICM 2015 ; Conference date: 05-07-2015 Through 10-07-2015",

year = "2015",

doi = "10.1016/j.phpro.2015.12.144",

language = "English",

volume = "75",

pages = "1294--1299",

journal = "Physics Procedia",

issn = "1875-3884",

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TY - JOUR

T1 - Coercivity Enhancement in la Coated Nd-Fe-B Thin Films

AU - Koike, Kunihiro

AU - Ishikawa, Hiroya

AU - Ogawa, Daisuke

AU - Kato, Hiroaki

AU - Miyazaki, Takamichi

AU - Ando, Yasuo

AU - Itakura, Masaru

N1 - Funding Information: Partial financial support for this research was Industry Academia Collaborative R&D Programs, from Japan Science and Technology Agency (JST), Japan. Publisher Copyright: © 2015 The Authors. Published by Elsevier B.V.

PY - 2015

Y1 - 2015

N2 - The Nd-Fe-B/La thin films were deposited on the Al2O3(0001) substrate in order to investigate the effect of rare earth overlayer on the coercivity Hc. Highly textured Nd2Fe14B grains were grown by inserting the Mo(111) single crystal buffer layer. By depositing the La overlayer onto Nd2Fe14B thin films and subsequently post-annealing at 470 °C, the Hc value increased from about 10.5 kOe to 15.0 kOe. The amount of Hc increase by the combination of the La coating and post-annealing was about 4.5 kOe. After the post annealing, La oxide (hcp La2O3) was formed in the La layer, which was confirmed by means of XRD and SIMS depth profile measurements.

AB - The Nd-Fe-B/La thin films were deposited on the Al2O3(0001) substrate in order to investigate the effect of rare earth overlayer on the coercivity Hc. Highly textured Nd2Fe14B grains were grown by inserting the Mo(111) single crystal buffer layer. By depositing the La overlayer onto Nd2Fe14B thin films and subsequently post-annealing at 470 °C, the Hc value increased from about 10.5 kOe to 15.0 kOe. The amount of Hc increase by the combination of the La coating and post-annealing was about 4.5 kOe. After the post annealing, La oxide (hcp La2O3) was formed in the La layer, which was confirmed by means of XRD and SIMS depth profile measurements.

KW - La overlayer

KW - NdFeB

KW - coercivity

KW - hcp-LaO

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U2 - 10.1016/j.phpro.2015.12.144

DO - 10.1016/j.phpro.2015.12.144

M3 - Conference article

AN - SCOPUS:84974678655

SN - 1875-3884

VL - 75

SP - 1294

EP - 1299

JO - Physics Procedia

JF - Physics Procedia

T2 - 20th International Conference on Magnetism, ICM 2015

Y2 - 5 July 2015 through 10 July 2015

ER -

Coercivity Enhancement in la Coated Nd-Fe-B Thin Films

Abstract

Keywords

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