TY - JOUR
T1 - Magnetic excitations in infinite-layer antiferromagnetic insulator
AU - Tomiyasu, Keisuke
AU - Kageyama, Hiroshi
AU - Lee, Changhoon
AU - Whangbo, Mike H.
AU - Tsujimoto, Yoshihiro
AU - Yoshimura, Kazuyoshi
AU - Taylor, Jon W.
AU - Llobet, Anna
AU - Trouw, Frans
AU - Kakurai, Kazuhisa
AU - Yamada, Kazuyoshi
PY - 2010/3
Y1 - 2010/3
N2 - The magnetic excitations of an infinite-layer antiferromagnetic insulator SrFeO2 were examined by powder inelastic neutron scattering to find dispersive magnetic excitations from ∼15 up to 63 meV. The scattering intensity distribution is well described by a spin wave model, confirming that the out-of-plane direct FeFe exchange is comparable in strength to the in-plane Fe-O-Fe superexchange. SrFeO2 shows an additional magnetic excitation mode around 30 meV, which is suggestive of an orbital magnon arising from small orbital moment on Fe2+ brought about by spin-orbit coupling.
AB - The magnetic excitations of an infinite-layer antiferromagnetic insulator SrFeO2 were examined by powder inelastic neutron scattering to find dispersive magnetic excitations from ∼15 up to 63 meV. The scattering intensity distribution is well described by a spin wave model, confirming that the out-of-plane direct FeFe exchange is comparable in strength to the in-plane Fe-O-Fe superexchange. SrFeO2 shows an additional magnetic excitation mode around 30 meV, which is suggestive of an orbital magnon arising from small orbital moment on Fe2+ brought about by spin-orbit coupling.
KW - Mott insulator
KW - Orbital angular momentum
KW - Orbital wave
KW - Spin wave
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U2 - 10.1143/JPSJ.79.034707
DO - 10.1143/JPSJ.79.034707
M3 - Article
AN - SCOPUS:77949700762
VL - 79
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 3
M1 - 034707
ER -