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Nb0.8CoSb ordering transformation caused by in situ heating-induced Nb diffusion

Li Qi-Zhu Fan Hao-Han Gao Zi-Heng Nan Peng-Fei Zhu Tie-Jun Ge Bing-Hui

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Nb0.8CoSb ordering transformation caused by in situ heating-induced Nb diffusion

Li Qi-Zhu, Fan Hao-Han, Gao Zi-Heng, Nan Peng-Fei, Zhu Tie-Jun, Ge Bing-Hui
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  • This study focuses on the investigation of Nb0.8CoSb half-Heusler alloy covered with Nb films. By employing in-situ heating transmission electron microscopy (TEM) technique, diffusion of Nb is observed at high temperature, showing the ordering transformation from Nb0.8CoSb to Nb0.8+δCoSb. Through observations of high-angle annular dark-field (HAADF) images and selected-area electron diffraction (SAED) patterns, it is found that under elevated temperatures, the diffuse streaks representing short-range disorder in Nb0.8CoSb sample transform into superlattice diffraction spots representing long-range order. The modulation wave vector of this superstructure is determined to be $ q={1}/{3}({a}^{*}+{b}^{*}-{c}^{*}) $. This structural evolution primarily arises from the diffusion of Nb atoms from the Nb film into the Nb0.8CoSb sample at high temperature, leading to compositional changes in Sb and Nb.Further comparative analysis reveals significant differences between in-situ synthesized Nb0.8+δCoSb samples and ex-situ synthesized Nb0.84CoSb samples despite both exhibiting superstructures. In the ex-situ synthesized Nb0.84CoSb, the modulation wave vector of the superstructure is $ q={1}/{3}({2a}^{*}-2{c}^{*}) $, which is mainly attributed to Nb compositional variations. Moreover, the superstructure in Nb0.84CoSb sample can remain stable from room temperature to high temperature, whereas in Nb0.8+δCoSb samples, it only exists at elevated temperatures and gradually weakens as the temperature decreases, suggesting that it may be a metastable structure between Nb0.8CoSb and Nb0.84CoSb.This study reveals the diversity of superstructures induced by compositional variations and the complexity of structural phase transitions in half-Heusler alloys, enriching the understanding of these materials and providing important guidance for the design and functional control of phase-change materials.
      Corresponding author: Ge Bing-Hui, bhge@ahu.edu.cn
    • Funds: Project supported by the National Natural Science Foundation of China (Grant Nos. 11874394, 92163203).
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    Lu N P, Zhang P F, Zhang Q H, Qiao R M, He Q, Li H B, Wang Y J, Guo J W, Zhang D, Duan Z, Li Z L, Wang M, Yang S Z, Yan M Z, Arenholz E, Zhou S Y, Yang W L, Gu L, Nan C W, Wu J, Tokura Y, Yu P 2017 Nature 546 124Google Scholar

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    Yun H, Zhang D L, Birol T, Wang J P, Mkhoyan K A 2023 Nano Lett. 23 7576Google Scholar

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    Tracy C L, Park S, Rittman D R, Zinkle S J, Bei H, Lang M, Ewing R C, Mao W L 2017 Nat. Commun. 8 15634Google Scholar

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    Liu T, Dou X Y, Xu Y H, Chen Y J, Han Y S 2020 Research 2020 4370817

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    Sato T, Yoshikawa K, Zhao W, Kobayashi T, Rajendra H B, Yonemura M, Yabuuchi N 2021 Energy Mater. Adv. 2021 9857563

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    He R J, Lei S, Liu M C, Qin M S, Zhong W, Cheng S J, Xie J 2022 Energy Mater. Adv. 2022 0003

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    Zhu W, Ren L, Li Y H, Lu C, Lin X, Zhang Q Y, Yang X, Hu Z G, Cheng T, Zhao Y Y, Zou J X 2023 Energy Mater. Adv. 4 0069Google Scholar

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    Kozlovskiy A L, Kenzhina I E, Zdorovets M V 2020 Ceram. Int. 46 10262Google Scholar

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    Yu C L, Li G, Kumar S, Yang K, Jin R C 2014 Adv. Mater. 26 892Google Scholar

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    Wu L Z, Hu H C, Xu Y, Jiang S, Chen M, Zhong Q X, Yang D, Liu Q P, Zhao Y, Sun B Q, Zhang Q, Yin Y D 2017 Nano Lett. 17 5799Google Scholar

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    Ito H, Muromoto M, Kurenuma S, Ishizaka S, Kitamura N, Sato H, Seki T 2013 Nat. Commun. 4 2009Google Scholar

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    Tezuka N, Ikeda N, Miyazaki A, Sugimoto S, Kikuchi M, Inomata K 2006 Appl. Phys. Lett. 89 112514Google Scholar

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    Goll G, Marz M, Hamann A, Tomanic T, Grube K, Yoshino T, Takabatake T 2008 Physica B 403 1065Google Scholar

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    Opeil C P, Mihaila B, Schulze R K, Mañosa L, Planes A, Hults W L, Fisher R A, Riseborough P S, Littlewood P B, Smith J L, Lashley J C 2008 Phys. Rev. Lett. 100 165703Google Scholar

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    Liu Z H, Zhang M, Cui Y T, Zhou Y Q, Wang W H, Wu G H, Zhang X X, Xiao G 2003 Appl. Phys. Lett. 82 424Google Scholar

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    Sutou Y, Imano Y, Koeda N, Omori T, Kainuma R, Ishida K, Oikawa K 2004 Appl. Phys. Lett. 85 4358Google Scholar

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    Hu F X, Shen B G, Sun J R, Wu G H 2001 Phys. Rev. B 64 132412Google Scholar

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    Hu F X, Shen B G, Sun J R 2000 Appl. Phys. Lett. 76 3460Google Scholar

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    Li Z, Jing C, Chen J P, Yuan S J, Cao S X, Zhang J C 2007 Appl. Phys. Lett. 91 112505Google Scholar

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    Khan M, Dubenko I, Stadler S, Ali N 2007 Appl. Phys. Lett. 91 072510Google Scholar

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    Xia K Y, Nan P F, Tan S H, Wang Y M, Ge B H, Zhang W Q, Anand S, Zhao X B, Snyder G J, Zhu T J 2019 Energy Environ. Sci. 12 1568Google Scholar

    [22]

    Nan P F, Wu K P, Liu Y M, Xia K Y, Zhu T J, Lin F, He J, Ge B H 2020 Nanoscale 12 21624Google Scholar

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    Liu Y, Fu C, Xia K Y, Yu J, Zhao X, Pan H F, Felser C, Zhu T J 2018 Adv. Mater. 30 1800881Google Scholar

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    Xia K Y, Liu Y, Anand S, Snyder G J, Xin J, Yu J, Zhao X, Zhu T 2018 Adv. Funct. Mater. 28 1705845Google Scholar

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    Pu Y H, He B W, Niu Y M, Liu X, Zhang B S 2023 Research 6 0043Google Scholar

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    Zhang H T, Wang W, Sun J, Zhong L, He L B, Sun L T 2022 Research 2022 9834636

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    南鹏飞, 杨丽霞, 王玉梅, 夏凯阳, 朱铁军, 葛炳辉 2019 电子显微学报 38 477Google Scholar

    Nan P F, Yang L X, Wang Y M, Xia K Y, Zhu T J, Ge B H 2019 J. Chin. Electron Microsc. Soc. 38 477Google Scholar

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    Pennycook S J, Boatner L A 1988 Nature 336 565Google Scholar

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    Pennycook S J 1989 Ultramicroscopy 30 58Google Scholar

  • 图 1  (a) 离位制备的Nb0.8CoSb合金的宏观形貌; (b) 离位制备的Nb0.8CoSb合金的XRD图谱; (c) 直流磁控溅射技术镀膜流程图

    Figure 1.  (a) Macroscopic morphology of the ex-situ prepared Nb0.8CoSb alloy; (b) XRD of the ex-situ prepared Nb0.8CoSb alloy; (c) schematic diagram of the magnetron sputtering deposition process using direct current magnetron sputtering.

    图 2  (a), (b) 原位加热实验Nb0.8CoSb样品大角度环形暗场(HAADF)像以及相应的[110]带轴的选区电子衍射花样; (c) 图 (a) 中黄色选框处能量色散谱图; (d) Nb膜与Nb0.8CoSb的界面区域的高分辨TEM像

    Figure 2.  (a) High-angle annular dark-field (HAADF) image of the Nb0.8CoSb sample before in-situ heating experiments; (b) corresponding selected-area electron diffraction patterns along the [110] zone axis; (c) energy dispersive spectroscopy (EDS) map at the yellow-boxed region in Fig. (a); (d) HRTEM image of the interface region between the Nb film and Nb0.8CoSb.

    图 3  (a)—(c) 原位加热实验样品HAADF像及橙色框区域的[110]带轴选区电子衍射花样及其示意图; (d) 图 (a) 中橙色框区域的高分辨TEM像

    Figure 3.  (a)–(c) HAADF image of the sample during in-situ heating experiment, the corresponding selected-area electron diffraction patterns along the [110] zone axis, and the schematic diagram of superlattice diffraction spots; (d) HRTEM image of the orange-boxed region in Fig. (a).

    图 4  (a) Nb0.8+δCoSb [110]取向的滤波像; (b), (c) 分别仅包含主衍射点信息和超结构衍射信息的滤波像; (d)—(f) 图(a)—(c)的放大像

    Figure 4.  (a) Filtered image of Nb0.8+δCoSb [110] orientation; (b), (c) filtered images containing only main diffraction spot information and superlattice diffraction information, respectively; (d)–(f) magnified views of images in (a)–(c).

    图 5  (a) Nb0.84CoSb [110]取向的选区电子衍射花样; (b) Nb0.84CoSb [110]取向的滤波像; (c), (d) 分别仅包含主衍射点信息和超结构衍射信息的滤波像; (e) Nb0.84CoSb超结构衍射点示意图; (f)—(h) 图 (b)—(d) 的放大像

    Figure 5.  (a) Selected area electron diffraction pattern of Nb0.84CoSb [110] orientation; (b) filtered image of Nb0.84CoSb [110] orientation; (c), (d) filtered images containing only main diffraction spot information and superlattice diffraction information, respectively; (e) schematic diagram of superlattice diffraction spots in Nb0.84CoSb; (f)–(h) magnified views of images in Figs. (b)–(d).

  • [1]

    Lu N P, Zhang P F, Zhang Q H, Qiao R M, He Q, Li H B, Wang Y J, Guo J W, Zhang D, Duan Z, Li Z L, Wang M, Yang S Z, Yan M Z, Arenholz E, Zhou S Y, Yang W L, Gu L, Nan C W, Wu J, Tokura Y, Yu P 2017 Nature 546 124Google Scholar

    [2]

    Yun H, Zhang D L, Birol T, Wang J P, Mkhoyan K A 2023 Nano Lett. 23 7576Google Scholar

    [3]

    Tracy C L, Park S, Rittman D R, Zinkle S J, Bei H, Lang M, Ewing R C, Mao W L 2017 Nat. Commun. 8 15634Google Scholar

    [4]

    Liu T, Dou X Y, Xu Y H, Chen Y J, Han Y S 2020 Research 2020 4370817

    [5]

    Sato T, Yoshikawa K, Zhao W, Kobayashi T, Rajendra H B, Yonemura M, Yabuuchi N 2021 Energy Mater. Adv. 2021 9857563

    [6]

    He R J, Lei S, Liu M C, Qin M S, Zhong W, Cheng S J, Xie J 2022 Energy Mater. Adv. 2022 0003

    [7]

    Zhu W, Ren L, Li Y H, Lu C, Lin X, Zhang Q Y, Yang X, Hu Z G, Cheng T, Zhao Y Y, Zou J X 2023 Energy Mater. Adv. 4 0069Google Scholar

    [8]

    Kozlovskiy A L, Kenzhina I E, Zdorovets M V 2020 Ceram. Int. 46 10262Google Scholar

    [9]

    Yu C L, Li G, Kumar S, Yang K, Jin R C 2014 Adv. Mater. 26 892Google Scholar

    [10]

    Wu L Z, Hu H C, Xu Y, Jiang S, Chen M, Zhong Q X, Yang D, Liu Q P, Zhao Y, Sun B Q, Zhang Q, Yin Y D 2017 Nano Lett. 17 5799Google Scholar

    [11]

    Ito H, Muromoto M, Kurenuma S, Ishizaka S, Kitamura N, Sato H, Seki T 2013 Nat. Commun. 4 2009Google Scholar

    [12]

    Tezuka N, Ikeda N, Miyazaki A, Sugimoto S, Kikuchi M, Inomata K 2006 Appl. Phys. Lett. 89 112514Google Scholar

    [13]

    Goll G, Marz M, Hamann A, Tomanic T, Grube K, Yoshino T, Takabatake T 2008 Physica B 403 1065Google Scholar

    [14]

    Opeil C P, Mihaila B, Schulze R K, Mañosa L, Planes A, Hults W L, Fisher R A, Riseborough P S, Littlewood P B, Smith J L, Lashley J C 2008 Phys. Rev. Lett. 100 165703Google Scholar

    [15]

    Liu Z H, Zhang M, Cui Y T, Zhou Y Q, Wang W H, Wu G H, Zhang X X, Xiao G 2003 Appl. Phys. Lett. 82 424Google Scholar

    [16]

    Sutou Y, Imano Y, Koeda N, Omori T, Kainuma R, Ishida K, Oikawa K 2004 Appl. Phys. Lett. 85 4358Google Scholar

    [17]

    Hu F X, Shen B G, Sun J R, Wu G H 2001 Phys. Rev. B 64 132412Google Scholar

    [18]

    Hu F X, Shen B G, Sun J R 2000 Appl. Phys. Lett. 76 3460Google Scholar

    [19]

    Li Z, Jing C, Chen J P, Yuan S J, Cao S X, Zhang J C 2007 Appl. Phys. Lett. 91 112505Google Scholar

    [20]

    Khan M, Dubenko I, Stadler S, Ali N 2007 Appl. Phys. Lett. 91 072510Google Scholar

    [21]

    Xia K Y, Nan P F, Tan S H, Wang Y M, Ge B H, Zhang W Q, Anand S, Zhao X B, Snyder G J, Zhu T J 2019 Energy Environ. Sci. 12 1568Google Scholar

    [22]

    Nan P F, Wu K P, Liu Y M, Xia K Y, Zhu T J, Lin F, He J, Ge B H 2020 Nanoscale 12 21624Google Scholar

    [23]

    Liu Y, Fu C, Xia K Y, Yu J, Zhao X, Pan H F, Felser C, Zhu T J 2018 Adv. Mater. 30 1800881Google Scholar

    [24]

    Xia K Y, Liu Y, Anand S, Snyder G J, Xin J, Yu J, Zhao X, Zhu T 2018 Adv. Funct. Mater. 28 1705845Google Scholar

    [25]

    Pu Y H, He B W, Niu Y M, Liu X, Zhang B S 2023 Research 6 0043Google Scholar

    [26]

    Zhang H T, Wang W, Sun J, Zhong L, He L B, Sun L T 2022 Research 2022 9834636

    [27]

    南鹏飞, 杨丽霞, 王玉梅, 夏凯阳, 朱铁军, 葛炳辉 2019 电子显微学报 38 477Google Scholar

    Nan P F, Yang L X, Wang Y M, Xia K Y, Zhu T J, Ge B H 2019 J. Chin. Electron Microsc. Soc. 38 477Google Scholar

    [28]

    Pennycook S J, Boatner L A 1988 Nature 336 565Google Scholar

    [29]

    Pennycook S J 1989 Ultramicroscopy 30 58Google Scholar

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  • Received Date:  05 March 2024
  • Accepted Date:  07 April 2024
  • Available Online:  23 April 2024
  • Published Online:  05 June 2024

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