Permanent magnets of cobalt, samarium, gadolinium alloy

Claim 1

A PERMANENT MAGNET WITH SUBSTANTIALLY STABLE PERMANENT MAGNET PROPERTIES AND CHARACTERIZED BY SIGNIFICANTLY LOW IN ZERO REVERSIBLE MAGNETIZATION TEMPERATURE COEFFICIENT IN AIR THROUGH A WIDE TEMPERATURE RANGE CONSISTING ESSENTIALLY OF A SINTERED PRODUCT OF COMPACTED PARTICULAR TERNARY METAL ALLOY CONSISTING ESSENTIALLY OF COLBALT AND RARE EARTH COMPONENT, SAID RARE EARTH COMPONENT RANGING IN AMOUNT FORM 16.6 ATOMIC % TO 20 ATOMIC % OF SAID TERNARY METAL ALLOY AND CONSISTING ESSENTIALLY SAMARIUM AND GADOLINIUM WITH THE GADOLINIUM ATOM FRACTION RANGING FROM 0.12 TO LESS THAN 0.5 OF SAID RARE EARTH COMPONENT OF SAID TERNARY ALLOY, SAID ALLOY CONSISTING ESSENTIALLY OF TWO PHASES WITH ONE OF SAID PHASES BEING A CO5GDSM ALLOY PHASE AND THE SECOND OF SAID PHASES BEING A COGDSM ALLOY PHASE RICHER IN RARE EARTH CONTENT THAN SAID CO5GDSM ALLOY PHASE, SAID SINTERED PRODUCT HAVING A DENSITY OF AT LEAST 87 PERCENT OF THEORTICAL AND HAVING PORES WHICH ARE SUBSTANTIALLY NON-INTERCONNECTING, AND SAID PERMANENT MAGNET HAVING A REVERSIBLE MAGNETIZATION TEMPERATURE COEFFICIENT IN AIR RANGING FROM-0.030% PER *C TO +0.015% PER*C OVER THE TEMPERATUER RANGE OF -50*C TO +300*C, A SATURATION MAGNETIZATION 4$JS OF AT LEAST 5 KILOGAUSS AND A COERCIVE FORCE HC OF AT LEAST -5,000 OERSTEDS IN SAID TEMPERATURE RANGE