Field induced metamagnetic transition of ErCo3 studied by NMR

NMR studies on magnetic properties of intermetallic compounds

“…Fig. 1 is quite different from those obtained in Er 1Àx Y x Co 3 at x ¼ 0 and 0.1 [2][3][4]. There, all the frequencies change at g ¼ 10:01 MHz=T, the gyromagnetic ratio of 59 Co.…”

“…From zero field NMR, three resolved Co lines were obtained at 23, 65 and 96 MHz, which correspond to 3b, 6c, 18h sites, respectively [2,3]. Their field dependence in fields applied parallel to the easy axis shows that all Co moments are aligned collinear to the c axis [3,4]. When an external field above 3 T is applied perpendicular to the c axis, a field induced metamagnetic transition occurs: the moments of 18h-and 3b-Co are inclined by 60 and 50 from the c axis, respectively, whereas that of 6c-Co is inclined by 20 [4].…”

Magnetic instabilities in studied by NMR

“…From the zero field NMR, three resolved Co lines were obtained at 23, 65, and 96 MHz, which correspond to 3b, 6c, 18h sites, respectively [2,3]. Their field dependence in fields applied parallel to the easy axis shows that all Co moments are aligned collinear to the c axis [3,4]. When an external field above 3 T is applied to perpendicular to c axis, the moments of 18h-and 3b-Co incline 60 and 50 from c-axis, respectively, whereas that of 6c-Co is inclined by a small angle of 20 [4].…”

“…Their field dependence in fields applied parallel to the easy axis shows that all Co moments are aligned collinear to the c axis [3,4]. When an external field above 3 T is applied to perpendicular to c axis, the moments of 18h-and 3b-Co incline 60 and 50 from c-axis, respectively, whereas that of 6c-Co is inclined by a small angle of 20 [4].According to the results of neutron diffraction in fields perpendicular to c axis [1], the moments on Er II are flipped by 55 from c direction towards the direction of fields above 3 T whereas Er I remains nearly oriented along the c axis (flipping angle of 15 from the c direction). As the moments of Er and Co keep always antiparallel, the average angle of Co moments is 41 .…”