書誌事項
- タイトル別名
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- Element-specific observation of the ferromagnetic ordering process in UCoAl via soft X-ray magnetic circular dichroism
抄録
We have performed soft X-ray magnetic circular dichroism (XMCD) experiments on the itinerant-electron metamagnet UCoAl at the U 4$d$-5$f$ ($N_\mathrm{4, 5}$) and Co 2$p$-3$d$ ($L_\mathrm{2, 3}$) absorption edges in order to investigate the magnetic properties of the U 5$f$ and Co 3$d$ electrons separately. From the line shape of the XMCD spectrum, it is deduced that the orbital magnetic moment of the Co 3$d$ electrons is unusually large. Through the systematic temperature ($T$)- and magnetic field ($H$)-dependent XMCD measurements, we have obtained two types of the magnetization curve as a function of $H$ and $T$ (M-H curve and M-T curve, respectively). The metamagnetic transition from a paramagnetic state to a field-induced ferromagnetic state was observed clearly under 15 K at $H_\mathrm{M}$. The value of the $H_\mathrm{M}$ and its $T$-dependence agree well between the U and Co sites, and the bulk magnetization. Whereas, we have discovered the remarkable differences in the M-H and M-T curves between the U and Co sites. The present findings show clearly that the role of the Co 3$d$ electrons should be considered more carefully in order to understand the origin of the magnetic ordering in UCoAl.
収録刊行物
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- Physical Review B
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Physical Review B 97 (18), 184414_1-184414_7, 2018-05
American Physical Society (APS)
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詳細情報 詳細情報について
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- CRID
- 1050564288768689664
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- NII論文ID
- 120006731606
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- ISSN
- 24699969
- 24699950
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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