Honeycomb structure, exhaust gas purifying device and method for producing honeycomb structure

A pillar shaped honeycomb structure, comprising:

• an outer peripheral wall;
• and
• porous partition walls disposed inside the outer peripheral wall, the partition walls defining a plurality of cells, each cell of the plurality of cells penetrating from one end face to an other end face to from a flow path,
• wherein one or both of the one end face and the other end face comprise a groove portion,
• wherein at least one annular conductive loop comprising a conductive material is embedded in the groove portion,
• wherein the conductive loop is a conductive particle-containing layer,
• wherein the conductive particle-containing layer comprises a joining material,
• wherein at least a part of the conductive loop comprises a conductive elastic member, the conductive elastic member is a conductive wire, a metal mesh, a thin portion of the conductive loop, or a spring member, and
• wherein the conductive loop has a thickness of from 0.5 to 5 mm.