Specific heat measurements revealing size-dependent magnetic phase transitions in ZnO nanowires

Michel Kazan; Hana Baroudi; Abdo Iskandar; Malek D. Tabbal; Junze Zhou; Anisha Gokarna; Aurelien Bruyant; Gilles Lérondel

doi:10.1117/12.3028929

4 October 2024 Specific heat measurements revealing size-dependent magnetic phase transitions in ZnO nanowires

Michel Kazan, Hana Baroudi, Abdo Iskandar, Malek D. Tabbal, Junze Zhou, Anisha Gokarna, Aurelien Bruyant, Gilles Lérondel

Author Affiliations +

Proceedings Volume PC13115, UV and Higher Energy Photonics: From Materials to Applications 2024; PC1311506 (2024) https://doi.org/10.1117/12.3028929
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

The effect of size on transitions between defect-induced magnetic phases in ZnO nanowires is investigated in a temperature range from 1.8 K to 300 K using calorimetric measurements of specific heat. The obtained results demonstrated interesting magnetic phenomena in unusual magnetic nanomaterials. At low temperatures, we observed isolated magnetic ions in nanowires of diameters 45-50 nm, and ferromagnetic phases in nanowires of diameters 85-100 nm. However, at higher temperatures, we observed multiple transitions between superparamagnetic phases in the thinner nanowires and multiple transitions between spin-glass phases in the thicker nanowires.

Conference Presentation

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Michel Kazan, Hana Baroudi, Abdo Iskandar, Malek D. Tabbal, Junze Zhou, Anisha Gokarna, Aurelien Bruyant, and Gilles Lérondel "Specific heat measurements revealing size-dependent magnetic phase transitions in ZnO nanowires", Proc. SPIE PC13115, UV and Higher Energy Photonics: From Materials to Applications 2024, PC1311506 (4 October 2024); https://doi.org/10.1117/12.3028929

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