title: Study of the sign change of exchange bias across the spin reorientation transition in Co(Cr1-xFex)2O4(x  =  0.00-0.125).
abstract: We present the evolution of novel phenomena of magnetic compensation effect, exchange bias (EB) effect and the field induced anomalies in '[Formula: see text]' substituted multiferroic compound [Formula: see text]. A few percent of '[Formula: see text]' substitution for '[Formula: see text]' in [Formula: see text] results in the reversal of field cooled magnetization under low applied fields below compensation temperature Tcomp. Further, increase in the field leads to the spin reorientation transition (TSR). Signature of EB in a narrow temperature window in the vicinity of TSRand its sign change across TSRis observed. Magnitude of EB depends on the amount of compensation and rigidity of the spin reorientation. We also notice the appearance of positive EB below the lock-in transition (TL). Presence of unidirectional anisotropy developed in the commensurate spin-spiral below TLcould be responsible for the appearance of EB below TL.
authors.affiliation: Department of Physics, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India.
authors.forename: R
authors.initials: R
authors.lastname: Padam
authors.forename: Swati
authors.initials: S
authors.lastname: Pandya
authors.forename: S
authors.initials: S
authors.lastname: Ravi
authors.forename: S
authors.initials: S
authors.lastname: Ramakrishnan
authors.forename: A K
authors.initials: AK
authors.lastname: Nigam
authors.forename: A K
authors.initials: AK
authors.lastname: Grover
authors.forename: D
authors.initials: D
authors.lastname: Pal