TY - JOUR
T1 - Modification of the interface nanostructure and magnetic properties in Nd-Fe-B thin films
AU - Koike, Kunihiro
AU - Kusano, Takanao
AU - Ogawa, Daisuke
AU - Kobayashi, Keisuke
AU - Kato, Hiroaki
AU - Oogane, Mikihiko
AU - Miyazaki, Takamichi
AU - Ando, Yasuo
AU - Itakura, Masaru
N1 - Publisher Copyright:
© 2016 Koike et al.
PY - 2016
Y1 - 2016
N2 - The effects of Nd2Fe14B grain size and Nd coating on the coercivity in sputter-deposited Nd-Fe-B/Nd thin films have been investigated in order to gain an insight into the coercivity mechanism of Nd-Fe-B magnets. Highly textured Nd2Fe14B particles were grown successfully on the MgO(100) single-crystal substrate with the Mo underlayer. As the Nd-Fe-B layer thickness tNFB was decreased from 70 to 5 nm, the coercivity Hc increased gradually from 6.5 to 16 kOe. By depositing the Nd overlayer onto these films and post-annealing at 500 °C, the Hc value further increased from 17.5 kOe (tNFB = 70 nm) to 26.2 kOe (tNFB = 5 nm). The amount of Hc increase by the combination of the Nd coating and post-annealing was about 10 kOe irrespective of the tNFB value. These results therefore suggest an independence of size and interface effects on the coercivity of Nd-Fe-B magnets.
AB - The effects of Nd2Fe14B grain size and Nd coating on the coercivity in sputter-deposited Nd-Fe-B/Nd thin films have been investigated in order to gain an insight into the coercivity mechanism of Nd-Fe-B magnets. Highly textured Nd2Fe14B particles were grown successfully on the MgO(100) single-crystal substrate with the Mo underlayer. As the Nd-Fe-B layer thickness tNFB was decreased from 70 to 5 nm, the coercivity Hc increased gradually from 6.5 to 16 kOe. By depositing the Nd overlayer onto these films and post-annealing at 500 °C, the Hc value further increased from 17.5 kOe (tNFB = 70 nm) to 26.2 kOe (tNFB = 5 nm). The amount of Hc increase by the combination of the Nd coating and post-annealing was about 10 kOe irrespective of the tNFB value. These results therefore suggest an independence of size and interface effects on the coercivity of Nd-Fe-B magnets.
UR - https://www.scopus.com/pages/publications/85007472443
UR - https://www.scopus.com/inward/citedby.url?scp=85007472443&partnerID=8YFLogxK
U2 - 10.1186/s11671-016-1227-x
DO - 10.1186/s11671-016-1227-x
M3 - Article
AN - SCOPUS:85007472443
SN - 1931-7573
VL - 11
JO - Nanoscale Research Letters
JF - Nanoscale Research Letters
IS - 1
M1 - 33
ER -