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論文

Manipulation of saturation magnetization and perpendicular magnetic anisotropy in epitaxial Co$$_{x}$$Mn$$_{4-x}$$N films with ferrimagnetic compensation

伊藤 啓太*; 安富 陽子*; Zhu, S.*; Nurmamat, M.*; 田原 昌樹*; 都甲 薫*; 秋山 了太*; 竹田 幸治; 斎藤 祐児; 小口 多美夫*; et al.

Physical Review B, 101(10), p.104401_1 - 104401_8, 2020/03

https://doi.org/10.1103/PhysRevB.101.104401
 被引用回数：14 パーセンタイル：73.18(Materials Science, Multidisciplinary)

Spintronics devices utilizing a magnetic domain wall motion have attracted increasing attention, and ferrimagentic materials with almost compensated magnetic moments are highly required to realize the fast magnetic domain wall motion. Here, we report a key function for this purpose in anti-perovskite Co$$_{x}$$Mn$$_{4-x}$$N films. Perpendicular magnetization emerges for $$0.8 leq x$$, and the saturation magnetization reaches a minimum value at $$x = 0.8$$.

口頭

Non-essentiality of an evolutionary conserved, highly essential gene, ${it gcp}$, in ${it Thermus}$ and ${it Deinococcus}$

中村 顕*; 小野瀬 晃由*; 北原 一正*; 正木 春彦*; 鳴海 一成; 星野 貴行*

no journal, , 

Gcp was first identified in ${it Mannheimia haemolytica}$ as an extracellular ${it O}$-sialoglycoprotein endopeptidase. Genome comparison revealed that all the free-living organisms, from bacteria to humans, possess its orthologues in an evolutionary-conserved manner. Moreover, the orthologues are highly essential in bacteria, including ${it Escherichia coli}$, ${it Bacillus subtilis}$ and yeast, indicating that Gcp has other function(s) related to essentiality of life. The ${it gcp}$ orthologues of ${it Thermus thermophilus}$ and ${it Deinococcus radiodurans}$ were deleted by replacement with antibiotic-resistant genes. Although both deletion mutants showed a little slower growth in rich media, successful gene disruption indicates that the ${it gcp}$ orthologues are not essential in these bacteria. In this work we showed that ${it gcp}$ orthologues of ${it T. thermophilus}$ and ${it D. radiodurans}$ were not essential, but the mutants showed different phenotypes, osmosensitivity and sensitivity to DNA-damaging agents, respectively.

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