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Detailed powder neutron diffraction studies as a function of temperature is performed on NdFeMnOin the temperature range 400-1.5 K. Diffused magnetic scattering is observed due to three dimensional short range ordering (SRO), between Fe/Mnspins, over the whole temperature range 400-1.5 K. The presence of SRO is independent of long range ordering (LRO) in this compound which has never been observed in any Fe/Mnbased compounds. Further, in this compound two-fold spin reorientation is discussed in the temperature range 300-1.5 K. Development of long range ordering at 300 K is due to the mixture of Γand Γmagnetic structure, not like other orthoferrites which have Γstructure at 300 K. This occurs due to the presence of large single ion anisotropy of Mnions. Volume fraction of Γdecreases with temperature leading to pure Γmagnetic structure in the temperature range 150-90 K. Another spin reorientation of Fe/Mnspins occurs from Γto Γin the temperature range 70-25 K.
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| http://dx.doi.org/10.1088/1361-648X/ab8499 | DOI Listing |
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