Enhancing Magnetic Ordering in Cr-doped Bi2Se3 using High-TC Ferrimagnetic Insulator. / Liu, Wenqing; He, Liang; Xu, Yongbing; Murata, koichi; Onbasli, Mehmet C. ; Lang, Murong; Maltby, nick; li, Shunpu; Wang, Xuefeng; Ross, Caroline; bencok, Peter; van der Laan, Gerrit ; Zhang, Rong; Wang, Kang.
In: Nano Letters, Vol. 15, No. 1, 14.01.2015, p. 764–769.Research output: Contribution to journal › Letter › peer-review
Enhancing Magnetic Ordering in Cr-doped Bi2Se3 using High-TC Ferrimagnetic Insulator. / Liu, Wenqing; He, Liang; Xu, Yongbing; Murata, koichi; Onbasli, Mehmet C. ; Lang, Murong; Maltby, nick; li, Shunpu; Wang, Xuefeng; Ross, Caroline; bencok, Peter; van der Laan, Gerrit ; Zhang, Rong; Wang, Kang.
In: Nano Letters, Vol. 15, No. 1, 14.01.2015, p. 764–769.Research output: Contribution to journal › Letter › peer-review
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TY - JOUR
T1 - Enhancing Magnetic Ordering in Cr-doped Bi2Se3 using High-TC Ferrimagnetic Insulator
AU - Liu, Wenqing
AU - He, Liang
AU - Xu, Yongbing
AU - Murata, koichi
AU - Onbasli, Mehmet C.
AU - Lang, Murong
AU - Maltby, nick
AU - li, Shunpu
AU - Wang, Xuefeng
AU - Ross, Caroline
AU - bencok, Peter
AU - van der Laan, Gerrit
AU - Zhang, Rong
AU - Wang, Kang
PY - 2015/1/14
Y1 - 2015/1/14
N2 - We report a study of enhancing the magnetic ordering in a model magnetically doped topological insulator (TI), Bi2–xCrxSe3, via the proximity effect using a high-TC ferrimagnetic insulator Y3Fe5O12. The FMI provides the TI with a source of exchange interaction yet without removing the nontrivial surface state. By performing the elemental specific X-ray magnetic circular dichroism (XMCD) measurements, we have unequivocally observed an enhanced TC of 50 K in this magnetically doped TI/FMI heterostructure. We have also found a larger (6.6 nm at 30 K) but faster decreasing (by 80% from 30 to 50 K) penetration depth compared to that of diluted ferromagnetic semiconductors (DMSs), which could indicate a novel mechanism for the interaction between FMIs and the nontrivial TIs surface.
AB - We report a study of enhancing the magnetic ordering in a model magnetically doped topological insulator (TI), Bi2–xCrxSe3, via the proximity effect using a high-TC ferrimagnetic insulator Y3Fe5O12. The FMI provides the TI with a source of exchange interaction yet without removing the nontrivial surface state. By performing the elemental specific X-ray magnetic circular dichroism (XMCD) measurements, we have unequivocally observed an enhanced TC of 50 K in this magnetically doped TI/FMI heterostructure. We have also found a larger (6.6 nm at 30 K) but faster decreasing (by 80% from 30 to 50 K) penetration depth compared to that of diluted ferromagnetic semiconductors (DMSs), which could indicate a novel mechanism for the interaction between FMIs and the nontrivial TIs surface.
U2 - 10.1021/nl504480g
DO - 10.1021/nl504480g
M3 - Letter
VL - 15
SP - 764
EP - 769
JO - Nano Letters
JF - Nano Letters
SN - 1530-6984
IS - 1
ER -