University of Groningen
Rhombohedral Hf0.5Zr0.5O2 thin films
Wei, Yingfen
DOI:
10.33612/diss.109882691
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Publication date: 2020
Link to publication in University of Groningen/UMCG research database
Citation for published version (APA):
Wei, Y. (2020). Rhombohedral Hf0.5Zr0.5O2 thin films: Ferroelectricity and devices. Rijksuniversiteit Groningen. https://doi.org/10.33612/diss.109882691
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Acknowledgments
I feel so luck to spend my PhD years at such a great place with so many talented and nice people around me. Without your support, it’s not possible for me to finish this thesis.
Firstly, I want to thank my supervisor Beatriz Noheda. You are the best supervisor I had during my student years. I am so lucky and happy to work in this group under your supervision. I’ve learnt a lot from your personality and working style. You are so caring, inspiring, and supporting. You always prioritize the students, and consider for our sake. I am grateful that you are so available and interested to discuss with me whenever I need. It is your guidance and encouragement that allow me to grow quickly and to be more confident. You set a great example yourself, to teach me become a critical thinking, independent, and rigorous researcher. Also thank you for giving me the chance to present our work in different conferences around the world, and introducing me to different scientists in the field. If I have the chance to be a supervisor in my future career, I hope I’ll be like you.
I also want to thank my second supervisor, Bart J. Kooi. You are such a fast-thinking person. Whenever I discussed my questions with you, you always quickly understood what I meant and explain to me. And thank you for offering me all the help I need. For example, you taught me how to operate TEM by yourself. You allow me to join in your group meeting for a short period of time, and sending Jamo to teach me how to make TEM specimens. Jamo, thank for your patient training and detailed explanations. You made the complicated procedures much easier. Graeme Blake, although I haven’t been to your lecture, I know you are the favorite teacher of many students. You are so kind and easy going and have never refused my request for discussion even when you were busy.
Four years of my PhD life taught me the importance of teamwork. I want to thank my supervisor Beatriz. Because of you, I was able to have such nice collabo-rators. I want to thank Sylvia Matzen for giving me chances to go to the University of Paris-Sud so I had the opportunity to start a new project and learn about the fab-rication of devices. As a beginner, I am grateful that we had spend so much quality
time in exploring this field. You always share your kindness with me without any reservation. I am also amazed by your good organizing skill, which taught me how to do experiments properly by preparing in advance. Guillaume Agnus, you are such a determined doer. Thanks for sharing your knowledge of device fabrications. We wouldn’t have explored so much without you. By the way, I also enjoyed our time doing mountain/cliff climbing in Laussane. Thomas Maroutian, thank you for your strong support to this project. Whenever I needed you, you were always there to offer help and give me comments, which warmed me. Philipe Lecoeur, as a group leader, I am so impressed by your rich career experience, from a musician to a physi-cist. I heard that you built many measurement equipment in your lab, from which I also benefited a lot.
I also had the great pleasure to collaborate with Jorge Iniguez and Hongjian Zhao in Luxembourg Institute. Thanks for your theoretical support, and also patience when discussing with me about structures. I really enjoy the fruitful discussion with you. Besides, I am also very happy to know you, Hongjian. Thanks for listening to me and giving me suggestions when I need your help. I hope you have a happy life and fruitful results in the U.S.
In the meantime, I would also like to thank Brahim Dkhil in CentraleSupelec, Paris. Brahim, we often meet at conferences. It seems that you are everywhere. Your humor makes me feel that research can be relaxing, and your encouragement makes me more confident. And also thank you, together with Vincent Garcia, Stephane Fusil, and Charles Paillard for taking me on trip in the U.S. when I was alone there.
Pavan, you are such a great colleague and teamplayer. I feel very lucky to have you here to work with me together. It seems that you know the answers to whatever questions I had. Thank you for your help not only about TEM but also a lot of other aspects. I also enjoyed your cheerful personality, which makes you very popular. I think I will lose so much fun when you are not around.
I love working with my current groupmates. You are always so friendly to me. I totally understand why the previous group members still want to come back here. Mart, I am so glad that we spent our PhD years working together. You are such a warm person and always give me positive energy to help me go through some hard time, specially when I first came Groningen and join this group. Thanks for those happy and special time we spent conducting experiments. You are so helpful and friendly to everyone around you. I also enjoyed a lot to attend your concert, which always makes me very relaxed. Arnoud, you are the one who brought me into the world of ferroelectrics. You’ve taught me a lot in this field. And your ”lazy” work style inspired me to rethink how to work efficiently. Thanks for being so straight-forward with me, so I can improve myself a lot. And thanks for throwing lots of parties with games, food, and wine. I had so much fun during the year you were in the group. All the best with the new job! There is a Chinese proverb saying: “Give
a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime”. Pavan, Mart, and Arnoud, thanks for teaching me how to ”fish”.
Cynthia, you are such an organized and sweet person. Your working style in-spired me to be a more rigorous researcher. Thanks for taking care of me during all the conferences we attended together. And thanks your patience answering all my often repeated questions. Jordi, your friendly personality and humor make every-one like you. Thank you for always sharing your profound knowledge whenever I asked you questions. Silvia, there is word in Chinese called “zhixing”, which prob-ably could be translated into intellectual beauty, which makes you so different from others. Hong, you are a energetic girl. Your laughter can cure people, and makes me feel that life is not so difficult. Wish you the best luck in your last year of PhD here. Ruben, thanks for helping and teaching me how to programme Keithley. Joshua, you’ve been so generous with your nice words to me and also other people. Thanks for your kindness. Ewout, your smile always makes me feel very warm. Lily, thank you very much for introducing me a lot of postdoc activities which also let me feel so warm. There are other students, Rick, Jolle, Vincent, Mike, Sietse, and so on. It is nice to have all of you in the group. Eric, Rebecca, and Evgenios, I am so glad to have you three as my students. Thanks for giving me this chance. I had tried to teach you something on your topics, what’s more important you also taught and surprise me a lot with your talents.
I also very appreciate the time I spent with my officemates. Machteld, I am amazed that how you always make everything go your way. Wish you all the best! Liany, I liked your homemade cakes very much. If you run a bakery in the future, I will definitely be your customer. Geert, thanks for showing me how to climb. Sanne, thanks for your often encouragement, which made me more confident. Silang, al-though you always behave like a big boss, people would know how lovely you are if they get to know you better. You have a very strong personality and it seems nothing can bother you. Thanks a lot for your company during past two years. Qikai, I felt so lucky that I was relocated to the new office with you one year ago, which made us much closer. I feel so comfortable to chat with you. To me, you are a very reliable person, not only in work, but also for your family. Also thanks for treating me at your home for dinner. I enjoyed your wife Hui’s cooking. it is a little bit salty but quite delicious. Good luck with finishing your PhD.
I would also like to thank people who joined in my PhD journey and interacted with me in this group. Guowei, thank for always treating me nicely. You are such an outgoing person and you seem to know all of Chinese in Groningen. Congratula-tions to you for becoming a dad! Thank you for all the nice food you shared with me. I was very glad to meet you and your wife Nan again in Dresden. Wish all the best to your new family! Justin, thanks for taking care of me during my first half year of PhD. The indian food your wife made was very delicious. Jorean, I am very glad that
I had the chance to travel to Poland with you and Jin. To be honest, I did not expect we hike so many days there. You two were so energetic. Saeedeh, thanks for all the generous help you offered to me, and hope everything is great with your new job. Phu, hope you are doing great in Twente. I’ve learnt a lot from you as a co-worker in my first year of PhD and I am also very happy to hear that you got married and now have a cute baby. Wish you all the best.
Jacob, I can not imagine how my work would be delayed without your techni-cal support. You are so patient, responsible and helpful technician. Also thanks for comforting me when I felt stressful. Your cheerful personality taught me that I should always see the world from different perspectives. Henk, you are an amazing engineer. You are like “Doraemon” with a magic pocket. Whatever we need, you can make them available for us in the workshop. I also enjoyed our “Crazy tennis” club with Pavan and Cnythia. You are a really good tennis teacher. Henriet, thanks for helping me to track all of paper works. I can’t imagine how much trouble I will run into without your help. I also want to thank the technical support from Arjun, Vasek, Hans, and Gert.
Jin, I can’t remember how many meals and how much wine we had together with Qihong. I feel very lucky to know you, and you’ve opened a new spiritual world for me. You were always there to support me. You have no idea what a nice person you are. I am sure all of people who know you would agree with me. I am very happy to know that you are doing so well in ASML. All the best for the new journey. Qihong, you are such a powerful person. You can take everything so easily and you always make me laugh. I had a great time with you and Jin around. Thanks for being so patient with me, answering lot of my stupid questions. Congratulations on getting a faculty position in China now. Because of you two, I have gotten to know lots of your alumni and friends. I had great time with Xu, Xinkai, Yanxi, Jingjin and Yue, Wei and Chunxu, Siyun, Chaoge, and others.
Jun, congratulations to you that you are officially qualified as a doctor now. I can’t believe that we have known each other for 10 years since our bachelor years. How lucky I am to be able to study in the same country and same field with you. I hope you find your favorite job soon. Maarten, it was nice to know you. Thanks for introducing Netherlands to me, which inspired me to come here for PhD study. I en-joyed a lot to live in this beautiful country for 4 years with all the wonderful people around me. Congratulations on having two cute babies! Yang, you are like my men-tor. Thanks for your great help during the time when I was confused. You are such an enthusiastic, helpful and considerate person. I hope your sports and diet plans can success this year. Moreover, I would like to thank my teachers during my Mas-ter study, Wenhui Xie, Zhenjie Zhao, and Xiaohong Li. Thanks for your encouragement and support during my research life.
to travel with you, Xiaoying, Yang, Yana, and Crystal during the Christmas holidays in 2015. How much fun we had! I hope we can do this again with all of you even after our graduation. Ping and Gang, congratulations on your very cute baby Zhilan. I enjoyed playing Majong with you and thanks for making me the delicious food (Ping, you definitely can be a great chef). Heng, I like the football socks that you gave to me, although I have not found chance to wear them yet. Lei and Juan, I am grateful that you trust me with your cat “xiaoyuanxiao” when you were away for holidays. I feel very happy to stay with him. Fanghua and Jie, thanks for hosting me for three weeks when I was “homeless”. Jing, I quite enjoyed the time we went to swing dance. You are a very considerate person. Also thank all of these buddies in Groningen, Tian and Dong, Qi, Wen, Cui, Mingpeng, Puhua, Kai, Xiaotian, liqiang and Yuanyuan, Huatang, Long, Xiaoshan, Hao, Yiqun and Yuan. You truly made my life here colourful.
Thank you my dear flatmates, including two cats and one guinea pig. Your com-pany made me feel that I am at home. I really enjoyed the time making different cuisines at weekends with you together. Crystal, I’ve never seen someone so sweet like you. You treat everyone so nicely. You should deserve the best. Wyste, you are the technician, driver (sorry, you are not the only one now) and dishwasher in our house. Thanks for helping fix so many problems. You are the lucky guy to win Crystal over. Xiangyang, your healthy lifestyle have influenced me a lot. You are also very considerate, and bring so much fun to our house. Fangfang, you are the kind of person who are always ready to help others. I hope you are living a happy life now in London with Quan. I miss your “Meicaikourou”. Ya’nan, you are like a big sister in our house and always takes care of others, wish you all the best in France.
In the end, I’d like to thank my families. Mom and dad, thanks for your courage and persistence in a very special time so I was come to this world. No matter what happened, you have always given me the best you can offer during my childhood. Mom, you’ve taught me to be a earnest and down-to-earth person. I remember I often came to your workplace during my childhood years, and witnessed how hard-working you were. It was you who inspired me to have the same attitude at work and at school. Dad, you are such a brave person. No matters how difficult the situa-tion is, you always chose to face up to the challenges and never escape. Thanks for your encouragement and advises during the key moment when I needed to make a choice. Thank you mom and dad for making me who I am now and giving me the courage to pursue the kind of life that I want. My dear sister, Yinjuan, for me, you are much more than a sister. Thanks for your unconditional support and taking care of mom and dad when I am away for study. Things could be very different without your help. I hope you’d be happier in the future. Also thank you, my brother-in-law (Jiahua), for hosting me during my vacations since my high school in Shanghai which broadened my horizon. And all of best wishes to my niece (Weixin). Jinxin, you are
like a family member to me. I enjoyed a lot the time we spent, traveling, reading books, watching movies, exercising, making plans, even studying. Thanks for al-ways being there for me, and sharing all my emotions. Your kindness, optimistism and patience, are shining to me. Also thank for the great support and warmth that your families shared with me.
Yingfen Groningen September 30, 2019
