Sublattice spin reversal and field induced $Fe^{3+}$ spin-canting across the magnetic compensation temperature in $Y_{1.5}Gd_{1.5}Fe_{5}O_{12}$ rare-earth iron garnet

Manik Kuila; Jose Renato Linares Mardegan; Akhil Tayal; Sonia Francoual; V. Raghavendra Reddy

doi:10.1088/1361-648X/acea11

paper

Sublattice spin reversal and field induced $F e^{3 +}$ spin-canting across the magnetic compensation temperature in $Y_{1.5} G d_{1.5} F e_{5} O_{12}$ rare-earth iron garnet

arXiv:2107.06508 · doi:10.1088/1361-648X/acea11

Abstract

In the present work $F e^{3 +}$ sublattice spin reversal and $F e^{3 +}$ spin-canting across the magnetic compensation temperature ( $T_{C o m p}$ ) are demonstrated in polycrystalline $Y_{1.5} G d_{1.5} F e_{5} O_{12}$ (YGdIG) by means of in-field $^{57} F e$ M $o ¨$ ssbauer spectroscopy measurements. Corroborating in-field $^{57} F e$ M $o ¨$ ssbauer measurements, both $F e^{3 +}$ & $G d^{3 +}$ sublattice spin reversal has also been manifested with x-ray magnetic circular dichroism (XMCD) measurement in hard x-ray region. Moreover from in-field $^{57} F e$ M $o ¨$ ssbauer measurements, estimation and analysis of effective internal hyperfine field ( $H_{e f f}$ ), relative intensity of absorption lines in a sextet elucidated unambiguously the signatures of $F e^{3 +}$ spin reversal, their continuous transition and field induced spin-canting of $F e^{3 +}$ sublattices across $T_{C o m p}$ . Further, Fe K- (Gd $L_{3}$ -) edge XMCD signal is observed to consist of additional spectral features, those are identified from $G d^{3 +}$ ( $F e^{3 +}$ ) magnetic ordering, enabling us the extraction of both the sublattices ( $F e^{3 +}$ & $G d^{3 +}$ ) information from a single edge analysis. The evolution of the magnetic moments as a function of temperature for both magnetic sublattices extracted either at the Fe K- or Gd $L_{3}$ -edge agree quite well with values that are extracted from bulk magnetization data of YGdIG and YIG ( $Y_{3} F e_{5} O_{12}$ ). These measurements pave new avenues to investigate how the magnetic behavior of such complex system acts across the compensation point.

9 pages, 9 figures

Sublattice spin reversal and field induced Fe3+ spin-canting across the magnetic compensation temperature in Y1.5​Gd1.5​Fe5​O12​ rare-earth iron garnet

Abstract

References in corpus (5)

Sublattice spin reversal and field induced $F e^{3 +}$ spin-canting across the magnetic compensation temperature in $Y_{1.5} G d_{1.5} F e_{5} O_{12}$ rare-earth iron garnet