Abstract: A nuclear magnetic resonance spectrometer comprises a sample holder being arranged in a constant magnetic field of a predetermined direction. The sample holder comprises a rotor adapted to receive a sample under investigation. The rotor is arranged to rotate the sample about a first axis being inclined to the predetermined direction at an acute angle of, preferably, 54.7.degree.. For heating up the rotor, a laser is provided emitting a laser beam which is directed upon a surface of the rotor. The laser beam is adjustable in intensity by means of a control device.

Abstract: A probe for spectrometric measurements of magnetic resonance at very high temperatures includes a resonator (3) within which is disposed a sample (9) to be analyzed. A laser beam from a laser (6) is conducted toward and focused upon the sample (9) for heating the same, and levitation of the sample (9) during measurement proceedings within the resonator (3), as a means of thermally isolating the sample (9) from its surroundings, is achieved by means of a levitation gas from a gas source (18) which is introduced into the resonator (3) by means of a constriction zone aperture (17) whereby the sample (9) is maintained within an upper cavity (16) of the resonator (3).