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The exceptional stiffness of diamond is strongly anisotropic due to its crystal structure, yet experimental quantification of Young’s modulus along different orientations remains limited. Here, we present a direct measurement of elastic anisotropy in microwave plasma chemical vapor deposition (MPCVD) single-crystal diamond (SCD) by analyzing the resonance frequencies of cantilevers aligned along distinct crystallographic directions. The measured Young’s modulus exhibited a minimum value of 1085 ± 21 GPa along the <100> direction and a maximum value of 1189 ± 22 GPa along the <110> direction. The compliance constants derived from the MPCVD-SCD differ substantially from previously reported values for natural diamonds and are more consistent with first-principles theoretical values. This method enables precise determination of orientation-dependent stiffness, revealing significant variation in Young’s modulus across crystallographic axes. These insights are critical for the design of diamond-based micro- and nano-mechanical systems as well as other high-precision devices, where directional elasticity strongly influences performance.

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  This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Zhaozong Zhang, Grace Wong, Zilong Zhang, Wen Zhao, Guo Chen, Satoshi Koizumi, Meiyong Liao; Ultraprecise anisotropy mapping of Young's modulus in single-crystal diamond via mechanical resonance. Appl. Phys. Lett. 3 November 2025; 127 (18): 181904 and may be found at https://doi.org/10.1063/5.0303903.

Keyword: Diamond, MEMS

Date published: 2025-11-03

Publisher: AIP Publishing

Journal:

• Applied Physics Letters (ISSN: 00036951) vol. 127 issue. 18 181904

Funding:

• Japan Society for the Promotion of Science 24H00287
• Japan Society for the Promotion of Science JPMXP1225NM5307
• Councile for Science, Technology and Innovation SIP

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5863

First published URL: https://doi.org/10.1063/5.0303903

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Updated at: 2025-11-06 16:30:04 +0900

Published on MDR: 2025-11-06 16:23:37 +0900