2.3.3.3.9. NXafm¶
Status:
application definition (contribution), extends NXspm
Description:
An application definition to describe atomic force microscopy (AFM).
Symbols:
No symbol table
- Groups cited:
NXcollection, NXdetector, NXentry, NXenvironment, NXinstrument, NXphase_lock_loop, NXpositioner, NXsensor, NXspm_cantilever_oscillator, NXspm_cantilever, NXspm_piezo_sensor
Structure:
definition: (required) NX_CHAR ⤆
Name of the definition that is used for the application. ...
Name of the definition that is used for the application.
Obligatory value:
NXafm
experiment_technique: (required) NX_CHAR ⤆
The AFM technique. ...
The AFM technique.
Obligatory value:
AFM
scan_mode: (required) NX_CHAR ⤆
The mode of the scan. ...
The mode of the scan.
- contact mode: Cantilever attempts to move on the sample surface in very close contact with the sample.
The cantilever deflection is usually employed to control the cantilever position using a PID feedback loop.
- non-contact mode: Cantilever attempts to oscillate above the sample surface. Cantilever attempts to stay in the
interaction (atomic force) zone therefore cantilever oscillator amplitude and frequency are deformed. The cantilever frequency or oscillation amplitude is usually employed to control the cantilever position using a PID feedback loop.
- tapping mode: Resembles to the non-contact mode, but at every point of scan the cantilever tip comes closer
to the sample surface (“taps it”). The cantilever oscillation amplitude is usually employed to control the cantilever position using a PID feedback loop.
- peak force tapping mode: Like the tapping mode, but at each point of the scan force-distance curve is recorded.
The maximum force is usually employed to control the cantilever position using a PID feedback loop.
Any of these values or a custom value (if you use a custom value, also set @custom=True):
contact mode
tapping mode
non-contact mode
peak force tapping mode
INSTRUMENT: (required) NXinstrument ⤆
photo_detector: (optional) NXdetector ⤆
Information about the quadrant photodiode deflection detector or interferometer.
SENSOR: (optional) NXsensor
The sensor information for the photodiode or interferometer.
SPM_CANTILEVER: (recommended) NXspm_cantilever
The cantilever information.
cantilever_oscillator: (recommended) NXspm_cantilever_oscillator ⤆
When a cantilever is oscillated close to its resonance, this describes t ...
When a cantilever is oscillated close to its resonance, this describes the oscillator properties.
A cantilever can be used in direct contact mode to detect interaction forces or oscillated close to its resonance frequency. Changes in the oscillation amplitude, phase (between oscillated tail and moving tip) or resonance frequency are very sensitive to changes in the interaction potential field, giving rise of various measurement modes, such as non-contact or intermittent-contact (tapping) modes.
reference_amplitude: (recommended) NX_NUMBER {units=NX_LENGTH} ⤆
reference_frequency: (recommended) NX_NUMBER {units=NX_FREQUENCY} ⤆
phase_positioner: (recommended) NXpositioner ⤆
The phase positioner of the cantilever.
amplitude_positioner: (recommended) NXpositioner ⤆
The amplitude positioner of the cantilever.
phase_lock_loop: (recommended) NXphase_lock_loop
Phase locked loop for cantilever lock-in device.
SCAN_ENVIRONMENT: (required) NXenvironment ⤆
The environment information.
XYpiezo_sensor: (optional) NXspm_piezo_sensor ⤆
This should be a link to the concept ...
This should be a link to the concept entry/instrument/xy_piezo_sensor.
head_temperature_sensor: (optional) NXsensor ⤆
This should be a link to the concept ...
This should be a link to the concept entry/instrument/head_temperature_sensor.
head_temperature_sensor: (optional) NXsensor
The temperature of the scan environment or head of the cantilever.
reproducibility_indicators: (optional) NXcollection ⤆
The group of indicators (links to the existing fields in different groups) t ...
The group of indicators (links to the existing fields in different groups) that measure the reproducibility of the experiment.
head_temperature: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/scan_environment/head_temperature
cryo_bottom_temperature: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/scan_environment/cryo_bottom_temperature
cryo_shield_temperature: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/scan_environment/cryo_shield_temperature
cantilever_oscillator: (optional) NXspm_cantilever_oscillator
This should be a link to ...
This should be a link to /entry/instrument/cantilever_spm/cantilever_oscillator
resolution_indicators: (optional) NXcollection ⤆
The group of indicators (links to the existing fields in different groups) that
head_temperature: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/scan_environment/head_temperature
cryo_bottom_temperature: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/scan_environment/cryo_bottom_temperature
cryo_shield_temperature: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/scan_environment/cryo_shield_temperature
cantilever_config: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/cantilever_spm/cantilever_config
amplitude_excitation: (optional) NX_NUMBER
This should be a link to ...
This should be a link to /entry/instrument/phase_lock_loop/amplitude_excitation
Hypertext Anchors¶
List of hypertext anchors for all groups, fields, attributes, and links defined in this class.
/NXafm/ENTRY/INSTRUMENT/SCAN_ENVIRONMENT/head_temperature_sensor-group
/NXafm/ENTRY/INSTRUMENT/SCAN_ENVIRONMENT/XYpiezo_sensor-group
/NXafm/ENTRY/INSTRUMENT/SPM_CANTILEVER/amplitude_positioner-group
/NXafm/ENTRY/INSTRUMENT/SPM_CANTILEVER/cantilever_oscillator-group
/NXafm/ENTRY/INSTRUMENT/SPM_CANTILEVER/cantilever_oscillator/reference_amplitude-field
/NXafm/ENTRY/INSTRUMENT/SPM_CANTILEVER/cantilever_oscillator/reference_frequency-field
/NXafm/ENTRY/INSTRUMENT/SPM_CANTILEVER/cantilever_oscillator/reference_phase-field
/NXafm/ENTRY/INSTRUMENT/SPM_CANTILEVER/phase_positioner-group
/NXafm/ENTRY/reproducibility_indicators/cantilever_oscillator-group
/NXafm/ENTRY/reproducibility_indicators/cryo_bottom_temperature-field
/NXafm/ENTRY/reproducibility_indicators/cryo_shield_temperature-field
/NXafm/ENTRY/reproducibility_indicators/head_temperature-field
/NXafm/ENTRY/resolution_indicators/amplitude_excitation-field
/NXafm/ENTRY/resolution_indicators/cryo_bottom_temperature-field
/NXafm/ENTRY/resolution_indicators/cryo_shield_temperature-field