YBa2Cu3O6+d-originated attraction force giving rise to Meissner effect at 300 K

TL;DR

This paper reports unusual water reactivity, excessive weight gain, and negative magnetic susceptibility in hydrated YBCO, suggesting an internal attractive force possibly responsible for the Meissner effect at room temperature.

Contribution

It introduces the hypothesis of an internal attraction force in YBCO that explains observed magnetic and weight anomalies at 300 K.

Findings

Excessive weight gain not proportional to absorbed water

Negative magnetic susceptibility at room temperature

Decreased weight of samples in magnetic field

Abstract

The exposure of YBCO to an air atmosphere at first at pH2O = 110 Pa and then at pH2O = 1 kPa has been used for uncharacteristic and unusual properties of YBCO to be observed. Among them there was an increased reactivity of YBCO with respect to water. Besides, it was experimentally obtained extremely excessive weight gain of hydrated YBCO samples that was not corresponding to the quantity of the absorbed water. Finally, we obtained the significant negative value of the room-temperature (RT) magnetic susceptibility in conventional magnetic study of the hydrated YBCO that was confirmed by the direct observation of decreasing weight of the same samples that were suspended above the source of controlled magnetic field (DC mode) at RT. All the results were explained on the basis of an approximate idea that there is a certain source of attractive force inside YBCO, acting on surrounding particles and bodies.