Magnetic phase diagram of Ge1-x-ySnxMnyTe multiferroic semiconductors; coexistence of ferromagnetic and cluster glass ordering

التفاصيل البيبلوغرافية
العنوان: Magnetic phase diagram of Ge1-x-ySnxMnyTe multiferroic semiconductors; coexistence of ferromagnetic and cluster glass ordering
المؤلفون: Khaliq, Abdul, Lewinska, Sabina, Minikaev, Roman, Arciszewska, Monika, Avdonin, Andrei, Brodowska, Beata, Slynko, Vasily E., Waniewska, Anna Slawska, Kilanski, Lukasz
سنة النشر: 2023
المجموعة: Condensed Matter
مصطلحات موضوعية: Condensed Matter - Materials Science
الوصف: We report the structural and magnetic results of polar {\alpha}-GeTe doped with Sn and Mn from x = 0.185 to 0.841 and y = 0.02 to 0.086, respectively. The magnetic results of Ge1-x-y(SnxMny)Te (GSMT) crystals identify Mn-clustering effect with scaling parameter, R = 0.033 for x ~ 0.2 and y = 0.06. The excessive Sn ions are assumed to drive the inception of short range ferromagnetic clusters. For the crystals revealing glassy magnetic behavior, the irreversibility temperature, Tirr shifts at high dc magnetic field which is well described by de Almeida-Thouless equation, {\delta}Tirr ~ H{\Phi}/2 yielding {\Phi} values of 1.55 and 1.7 that validates the formation of Mn clusters. The spin relaxation time, {\tau}0 ~ 10-9 s, activation energy, Ea/kB ~ 5 TF where TF is freeing temperature and Vogel-Fulcher temperature, T0 ~ TF also signify intracluster interactions. Also, the Mn-hole magnetic exchange constant, Jpd drops from 0.24 eV for the samples with smaller Sn content of x ~ 0.2 to 0.16 eV for Sn rich alloy with x ~ 0.8. Consequently, we present a magnetic phase diagram for GSMT bulk crystals as a function of Mn(y) ions.
Comment: This preprint has 18 pages, 8 main figures, 2 tables and 7 supporting figures
نوع الوثيقة: Working Paper
URL الوصول: http://arxiv.org/abs/2305.12499
رقم الأكسشن: edsarx.2305.12499
قاعدة البيانات: arXiv