Cycloidal Magnetic Ordering in Noncentrosymmetric EuIrGe$_3$
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866913158143148032 |
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| author | Matsumura, Takeshi Tsukagoshi, Mitsuru Ueda, Yoshihisa Higa, Nonoka Nakao, Akiko Kaneko, Koji Kakihana, Masashi Hedo, Masato Nakama, Takao Ōnuki, Yoshichika |
| author_facet | Matsumura, Takeshi Tsukagoshi, Mitsuru Ueda, Yoshihisa Higa, Nonoka Nakao, Akiko Kaneko, Koji Kakihana, Masashi Hedo, Masato Nakama, Takao Ōnuki, Yoshichika |
| contents | Successive magnetic phase transitions at $T_{\text{N}}$=12.2 K, $T_{\text{N}}^{\;\prime}$=7.0 K, and $T_{\text{N}}^{\;*}$=5.0 K in EuIrGe$_3$, an intermetallic compound with a body centered tetragonal lattice belonging to a polar space group $I4mm$, has been investigated by neutron diffraction and resonant X-ray diffraction. It is shown that EuIrGe$_3$ exhibits an incommensurate longitudinal sinusoidal order with $q\sim (0, 0, 0.792)$ and $m_{q} \parallel c\text{-axis}$ in the high temperature phase ($T_{\text{N}}^{\;\prime}< T < T_{\text{N}}$), which changes to a cycloidal order with $q=(δ', 0, 0.8)$ ($δ'\sim 0.017$) and $m_{q} \parallel ac\text{-plane}$ in the intermediate phase ($T_{\text{N}}^{\;*} < T < T_{\text{N}}^{\;\prime}$). In the low temperature phase ($T < T_{\text{N}}^{\;*}$), the cycloidal plane rotates by $45^{\circ}$ to have $q=(δ, δ, 0.8)$ ($δ\sim 0.012$). It is also pointed out that the X-ray scattering amplitude from odd-parity magnetic quadrupole due to the polar environment interfere with that from normal even-parity magnetic dipole in the magnetic ordered phase. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2206_06596 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Cycloidal Magnetic Ordering in Noncentrosymmetric EuIrGe$_3$ Matsumura, Takeshi Tsukagoshi, Mitsuru Ueda, Yoshihisa Higa, Nonoka Nakao, Akiko Kaneko, Koji Kakihana, Masashi Hedo, Masato Nakama, Takao Ōnuki, Yoshichika Strongly Correlated Electrons Successive magnetic phase transitions at $T_{\text{N}}$=12.2 K, $T_{\text{N}}^{\;\prime}$=7.0 K, and $T_{\text{N}}^{\;*}$=5.0 K in EuIrGe$_3$, an intermetallic compound with a body centered tetragonal lattice belonging to a polar space group $I4mm$, has been investigated by neutron diffraction and resonant X-ray diffraction. It is shown that EuIrGe$_3$ exhibits an incommensurate longitudinal sinusoidal order with $q\sim (0, 0, 0.792)$ and $m_{q} \parallel c\text{-axis}$ in the high temperature phase ($T_{\text{N}}^{\;\prime}< T < T_{\text{N}}$), which changes to a cycloidal order with $q=(δ', 0, 0.8)$ ($δ'\sim 0.017$) and $m_{q} \parallel ac\text{-plane}$ in the intermediate phase ($T_{\text{N}}^{\;*} < T < T_{\text{N}}^{\;\prime}$). In the low temperature phase ($T < T_{\text{N}}^{\;*}$), the cycloidal plane rotates by $45^{\circ}$ to have $q=(δ, δ, 0.8)$ ($δ\sim 0.012$). It is also pointed out that the X-ray scattering amplitude from odd-parity magnetic quadrupole due to the polar environment interfere with that from normal even-parity magnetic dipole in the magnetic ordered phase. |
| title | Cycloidal Magnetic Ordering in Noncentrosymmetric EuIrGe$_3$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2206.06596 |