Chromium telluride Cr${}_3$Te${}_4$ with intrinsic room-temperature ferromagnetism has substantially practical application in spintronics. In this work, the microwave response of Cr${}_3$Te${}_4$ single crystal is investigated by the electronic spin resonance (ESR) with the magnetic field applied along various directions. Two resonance lines are observed for both $H//ab$ and $H//c$, which are suggested to result from ferromagnetic (FM) and antiferromagnetic (AFM) fluctuations respectively. The angle-dependent ESR spectra show considerable anisotropy, with a strong microwave response for $H//ab$ and a weak microwave response for $H//c$. The analysis of the ESR spectra reveals the coexistence of FM and AFM fluctuations in this system. Moreover, this anisotropic microwave response in single crystal Cr${}_3$Te${}_4$ could benefit the microwave-based spintronic device.

碲化铬Cr${}_3$碲${}_4$具有本征室温铁磁性的材料在自旋电子学中具有广泛的实际应用。在这项工作中，Cr 的微波响应${}_3$碲${}_4$通过沿不同方向施加磁场的电子自旋共振 (ESR) 来研究单晶。观察到两条共振线$H//A乙$和$H//C$，这被认为分别是由铁磁（FM）和反铁磁（AFM）波动引起的。与角度相关的 ESR 光谱显示出相当大的各向异性，对微波具有强烈的响应$H//A乙$和微弱的微波响应$H//C$。ESR 谱分析揭示了该系统中 FM 和 AFM 波动的共存。此外，单晶 Cr 中的这种各向异性微波响应${}_3$碲${}_4$可以使基于微波的自旋电子器件受益。