Pillar shaped honeycomb structure, exhaust gas purifying device, exhaust system, and method for producing honeycomb structure

An exhaust system comprising:

• an exhaust muffler;
• an exhaust gas purifying device provided in the muffler, the exhaust gas purifying device including a pillar shaped honeycomb structure comprising:
• a porous partition wall that defines a plurality of cells, the cells forming flow paths for a fluid, the cells extending from an inflow end face to an outflow end face;
• and
• an outer peripheral wall located at the outermost circumference;
• wherein at least a part of surfaces of the partition wall has a surface layer,
• wherein the surface layer comprises magnetic particles and has permeability;
• and
• wherein the magnetic particles have a curie temperature of 670° C. or more;
• a coil wiring that spirally surrounds an outer circumference of the pillar shaped honeycomb structure;
• a fixing member for fixing the coil wiring to an interior of an exhaust gas flow path, the fixing member being positioned outside the coil wiring;
• and
• a silencer provided in the exhaust muffler.