Magnetic Behavior of Single La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ Nanotubes: Surface and Shape Effects

Abstract

We report magnetization experiments in two magnetically isolated ferromagnetic nanotubes of perovskite La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$. The results show that the magnetic anisotropy is determined by the sample shape although the coercive field is reduced by incoherent magnetization reversal modes. The temperature dependence of the magnetization reveals that the magnetic behavior is dominated by grain surface properties. These measurements were acquired using a Silicon micro-mechanical oscillator working in its resonant mode. The sensitivity was enough to measure the magnetic properties of these two samples with a mass lower than 14 picograms and to obtain for the first time the magnetization loop for one isolated nanotube.

arXiv comment12 pages, 4 figures. Accepted for publication in Journal of Applied Physics

References in corpus (2)

• Nearly total spin polarization in La2/3Sr1/3MnO3 from tunneling experiments
• Measurement of mesoscopic High-$T_c$ superconductors using Si mechanical micro-oscillators

Cited by in corpus (6)

• Direct determination of the collective pinning radius in high temperature superconductors
• Magnetic hysteresis behavior of granular manganite La${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ nanotubes
• Micromagnetic simulation study of a disordered model for one-dimensional granular perovskite manganite oxide nanostructures
• Dependence of vortex phase transitions in mesoscopic BSCCO superconductor at tilted magnetic fields
• Temperature dependence of coercivity for isolated Ni nanowires unraveled by high-sensitivity micromagnetometry
• Thermodynamic evidence for the Bose glass transition in twinned YBa${}_2$Cu${}_3$O${}_{7-\delta }$ crystals