Memory device, recording method, and recording and reproducing method

A recording method to record a signal, by vibration-driving a probe which writes the signal in a first direction or the recording medium in a first direction, in the recording medium for storing the signal, the recording method comprising:

• detecting a change in an amplitude of the resonance drive when the probe or the recording medium is vibration-driven in the first direction by changing a frequency;
• detecting the frequency at which the detected amplitude becomes maximum as a resonance frequency;
• calculating a timing when the probe writes the signal into the recording medium using the detected resonance frequency;
• and
• vibration-driving the probe or the recording medium in the first direction at the resonance frequency at the time of writing, and writing a plurality of the signals into the recording medium at the detected timing by the probe.

A recording and reproducing method to record and reproduce a signal by vibration-driving a probe to write the signal in a recording medium to store the signal in a first direction or the recording medium in the first direction, the recording and reproducing method comprising:

• detecting a change in an amplitude of the resonance drive when the probe or the recording medium is vibration-driven in the first direction by changing a frequency;
• detecting the frequency at which the detected amplitude becomes maximum as a resonance frequency;
• calculating a timing when the probe writes the signal into the recording medium using the detected resonance frequency;
• vibration-driving the probe or the recording medium in the first direction at the resonance frequency at the time of writing, and writing a plurality of the signals into the recording medium at the detected timing by the probe;
• and
• reading the signals from the recording medium by the probe.