Polarized-neutron-diffraction study of the microscopic magnetic structure in α'-Fe_(16)N_2 nanoparticles

H. Hiraka; K. Ohoyama; Y. Ogata; T. Ogawa; R. Gallage; N. Kobayashi; M. Takahashi; B. Gillon; A. Gukasov; K. Yamada

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Polarized-neutron-diffraction study of the microscopic magnetic structure in α'-Fe_(16)N_2 nanoparticles

机译：α“ -Fe_（16）N_2纳米粒子的微观磁结构的极化中子衍射研究

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Polarized-neutron-diffraction (PND) measurements were carried out using a pseudo-single-phase powder sample of ferromagnetic α"-Fe_(16)N_2 nanoparticles. For the well-identified α"-Fe_(16)N_2 phase, sizes of the magnetic moments at the three crystallographic Fe sites were determined in the absolute scale. The agreement between the magnetization value deduced from the present PND and that measured by a magnetometer (M_(VSM)) supports the hypothesis that M_(VSM) is primarily caused by the magnetization value in the target α"-Fe_(16)N_2; thus there is no evidence for macroscopic giant saturation magnetization, at least for α"-Fe_(16)N_2 nanoparticles. On the basis of the large magnetic moment size at one of the Fe sites, a possible coexisting state of localized spins and itinerant electron spins is inferred. Drawing a distinction between thin films and nanoparticles is currently necessary because of their divergent magnetic evolutions.

机译：使用铁磁α“ -Fe_（16）N_2纳米粒子的拟单相粉末样品进行极化中子衍射（PND）测量。对于良好识别的α” -Fe_（16）N_2相，尺寸为以绝对尺度确定了三个结晶Fe点的磁矩。从当前PND推导出的磁化值与由磁力计（M_（VSM））测得的磁化值之间的一致性支持以下假设：M_（VSM）主要由目标α“ -Fe_（16）N_2中的磁化值引起；因此，没有证据表明宏观宏观饱和磁化强度，至少对于α“ -Fe_（16）N_2纳米粒子而言。基于在一个Fe位置处的大磁矩大小，可以推断出局部自旋和流动电子自旋的可能共存状态。由于薄膜和纳米粒子的发散性不同，目前有必要在薄膜和纳米粒子之间进行区分。

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来源
《Physical review》 |2014年第13期|134427.1-134427.5|共5页
作者
H. Hiraka; K. Ohoyama; Y. Ogata; T. Ogawa; R. Gallage; N. Kobayashi; M. Takahashi; B. Gillon; A. Gukasov; K. Yamada;
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作者单位

Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tokai, Ibaraki 319-1106, Japan;

Center of Neutron Science for Advanced Materials, Institute for Materials Research (IMR), Tohoku University, Sendai 980-8577, Japan;

New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan;

Graduate School of Engineering, Tohoku University, Sendai 980-8578, Japan;

Technical Strategy Department, Research and Development Division, TODA Kogyo Corporation, Otake, Hiroshima 739-0652, Japan;

Technical Strategy Department, Research and Development Division, TODA Kogyo Corporation, Otake, Hiroshima 739-0652, Japan,T&T Innovations Inc., Otake, Hiroshima 739-0652, Japan;

New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan;

Laboratoire Leon Brillouin (LLB), CEA/CNRS, F-91191 Gif-sur-Yvette Cedex, France;

Laboratoire Leon Brillouin (LLB), CEA/CNRS, F-91191 Gif-sur-Yvette Cedex, France;

Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tokai, Ibaraki 319-1106, Japan;

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正文语种 eng
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fe and its alloys; permanent magnets;

机译：Fe及其合金;永久磁铁;

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1. Electron diffraction and microcopy study and band structure calculation of ferromagnetic iron-nitride #alpha#＇＇-Fe_(16)N_2 [J] . H.Tanaka, Y.Hirotsu 日本応用磁気学会誌 . 1999,第3期

机译：铁磁性氮化铁#alpha＃′-Fe_（16）N_2的电子衍射和显微研究及能带结构计算
2. Electron diffraction and microcopy study and band structure calculation of ferromagnetic iron-nitride #alpha#＇＇-Fe_(16)N_2 [J] . H.Tanaka, Y.Hirotsu 日本応用磁気学会誌 . 1999,第3期

机译：电子衍射和微透视研究和结构结构计算，铁磁铁 - 氮化物#Alpha＃'' - fe_（16）n_2
3. Preparation and Evaluation of Magnetic Nanocomposite Films and Fibers Containing α″-Fe_(16)N_2 Nanoparticles [J] . Christina W. Kartikowati 粉体工学会誌 . 2018,第1期

机译：含α″ -Fe_（16）N_2纳米粒子的磁性纳米复合薄膜和纤维的制备与评价
4. Thermal Plasma Synthesis of gamma -FeN_x Nanoparticles as Precursors for the Fe_(16)N_2 Synthesis by Annealing [C] . Z. Turgut, D. E. Ferguson, M. Q. Huang, Symposium on Advanced Hard and Soft Magnetic Materials held April 5-8, 1999, San Francisco, California, U.S.A. . 1999

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Polarized-neutron-diffraction study of the microscopic magnetic structure in α'-Fe_(16)N_2 nanoparticles

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