Magnetic effect on the phase transitions of n-docosane by means of a high resolution and super-sensitive DSC

•The magnetic effect on the phase transitions of n-C22H46 (docosane) was measured.•The transition temperatures changed about 10mK by applying magnetic field of 5T.•The experiment temperature changes were much larger than the calculated value. The magnetic effect on the phase transitions of n-C22H46 (docosane) was measured using a high resolution and super-sensitive DSC. The surface freezing phenomenon was observed at about 3K above the ‘bulk’ melting temperature in addition to solid–solid transitions and melting transition. The transition temperatures due to the solid–solid transitions and melting were shifted to higher temperatures by about 10mK by applying magnetic field of 5T. On the other hand, the transition temperature due to surface freezing phenomenon was shifted to lower temperature by about 10mK by applying magnetic field of 5T. The magnetic effects were discussed based on the extension of the Clapeyron equation.